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  • What really happens when I use varchar(10) in the sqlite command-line shell?

    - by romandas
    I'm messing around with SQLite for the first time by working through some of the SQLite documentation. In particular, I'm using Command Line Shell For SQLite and the SoupToNuts SQLite Tutorial on Sourceforge. According to the SQLite datatype documentation, there are only 5 datatypes in SQLite. However, in the two tutorial documents above, I see where the authors use commands such as create table tbl1(one varchar(10), two smallint); or create table t1 (t1key INTEGER PRIMARY KEY,data TEXT,num double,timeEnter DATE); which contain datatypes that aren't listed by SQLite, yet these commands work just fine. Additionally, when I ran .dump to see the SQL statements, these datatype specifications are preserved. So, what gives? Does SQLite keep a reference for any datatype specified in the SQL yet converts it behind the scenes to one of its 5 datatypes? Or is there something else I'm missing?

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  • Implementing EAV pattern with Hibernate for User -> Settings relationship

    - by Trevor
    I'm trying to setup a simple EAV pattern in my web app using Java/Spring MVC and Hibernate. I can't seem to figure out the magic behind the hibernate XML setup for this scenario. My database table "SETUP" has three columns: user_id (FK) setup_item setup_value The database composite key is made up of user_id | setup_item Here's the Setup.java class: public class Setup implements CommonFormElements, Serializable { private Map data = new HashMap(); private String saveAction; private Integer speciesNamingList; private User user; Logger log = LoggerFactory.getLogger(Setup.class); public String getSaveAction() { return saveAction; } public void setSaveAction(String action) { this.saveAction = action; } public User getUser() { return user; } public void setUser(User user) { this.user = user; } public Integer getSpeciesNamingList() { return speciesNamingList; } public void setSpeciesNamingList(Integer speciesNamingList) { this.speciesNamingList = speciesNamingList; } public Map getData() { return data; } public void setData(Map data) { this.data = data; } } My problem with the Hibernate setup, is that I can't seem to figure out how to map out the fact that a foreign key and the key of a map will construct the composite key of the table... this is due to a lack of experience using Hibernate. Here's my initial attempt at getting this to work: <composite-id> <key-many-to-one foreign-key="id" name="user" column="user_id" class="Business.User"> <meta attribute="use-in-equals">true</meta> </key-many-to-one> </composite-id> <map lazy="false" name="data" table="setup"> <key column="user_id" property-ref="user"/> <composite-map-key class="Command.Setup"> <key-property name="data" column="setup_item" type="string"/> </composite-map-key> <element column="setup_value" not-null="true" type="string"/> </map> Any insight into how to properly map this common scenario would be most appreciated!

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  • t-sql i am transforming data

    - by João Pedro Portelinha
    I am transforming data from this legacy table: MovTime (IdMov INT, IdPerson NVARCHAR(20), Date1 datetime, Type1 nvarchar(30) ) IdMov IdPerson Date1 Type ----------- -------------------- ----------------------- ------------------------------ 1 David 2012-06-01 09:00:00.000 Entered 2 David 2012-06-01 12:30:00.000 Exit 3 David 2012-06-01 14:00:00.000 Entered 4 David 2012-06-01 18:30:00.000 Exit 5 Kim 2012-06-02 09:00:00.000 Entered 6 Kim 2012-06-02 12:00:00.000 Exit ... I want the result to be the following: IdPerson Data Total Time ---------- ---------- ---------- David 2012-06-01 08:00:00 Kim 2012-06-02 03:00:00 T-SQL declare @WK_TABLE TABLE (IdMov INT, IdPerson NVARCHAR(20), Date1 datetime, Type1 nvarchar(30)) Insert into @WK_TABLE values(1,'David', '2012-06-01 09:00', 'Entered') Insert into @WK_TABLE values(2,'David', '2012-06-01 12:30', 'Exit') Insert into @WK_TABLE values(3,'David', '2012-06-01 14:00', 'Entered') Insert into @WK_TABLE values(4,'David', '2012-06-01 18:30', 'Exit') Insert into @WK_TABLE values(5,'Kim', '2012-06-02 09:00', 'Entered') Insert into @WK_TABLE values(6,'Kim', '2012-06-02 12:00', 'Exit') select * from @WK_TABLE Can someone help me?

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  • asp.net mvc textbox date format

    - by maxxxee
    My form contains a textbox for date input. When submitted the data is used to add a row to the table. The view is strongly typed to the table. The problem is that the database server is configured with US date format. But the users need to use UK date format in the textbox. When users enter uk date format error is thrown. The database server configuration cannot be changed. So what can be done so that users can enter date in uk format?

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  • text indexes vs integer indexes in mysql

    - by imanc
    Hey, I have always tried to have an integer primary key on a table no matter what. But now I am questioning if this is always necessary. Let's say I have a product table and each product has a globally unique SKU number - that would be a string of say 8-16 characters. Why not make this the PK? Typically I would make this field a unique index but then have an auto incrementing int field as the PK, as I assumed it would be faster, easier to maintain, and would allow me to do things like get the last 5 records added with ease. But in terms of optimisation, assuming I'd only ever be matching the full text field and next doing text matching queries (e.g. like %%) can you guys think of any reasons not to use a text based primary key, most likely of type varchar()? Cheers, imanc

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  • web.xml not reloading in tomcat even after stop/start

    - by ajay
    This is in relation to:- http://stackoverflow.com/questions/2576514/basic-tomcat-servlet-error I changed my web.xml file, did ant compile , all, /etc/init.d/tomcat stop , start Even then my web.xml file in tomcat deployment is still unchanged. This is build.properties file:- app.name=hello catalina.home=/usr/local/tomcat manager.username=admin manager.password=admin This is my build.xml file. Is there something wrong with this:- <!-- Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. --> <!-- General purpose build script for web applications and web services, including enhanced support for deploying directly to a Tomcat 6 based server. This build script assumes that the source code of your web application is organized into the following subdirectories underneath the source code directory from which you execute the build script: docs Static documentation files to be copied to the "docs" subdirectory of your distribution. src Java source code (and associated resource files) to be compiled to the "WEB-INF/classes" subdirectory of your web applicaiton. web Static HTML, JSP, and other content (such as image files), including the WEB-INF subdirectory and its configuration file contents. $Id: build.xml.txt 562814 2007-08-05 03:52:04Z markt $ --> <!-- A "project" describes a set of targets that may be requested when Ant is executed. The "default" attribute defines the target which is executed if no specific target is requested, and the "basedir" attribute defines the current working directory from which Ant executes the requested task. This is normally set to the current working directory. --> <project name="My Project" default="compile" basedir="."> <!-- ===================== Property Definitions =========================== --> <!-- Each of the following properties are used in the build script. Values for these properties are set by the first place they are defined, from the following list: * Definitions on the "ant" command line (ant -Dfoo=bar compile). * Definitions from a "build.properties" file in the top level source directory of this application. * Definitions from a "build.properties" file in the developer's home directory. * Default definitions in this build.xml file. You will note below that property values can be composed based on the contents of previously defined properties. This is a powerful technique that helps you minimize the number of changes required when your development environment is modified. Note that property composition is allowed within "build.properties" files as well as in the "build.xml" script. --> <property file="build.properties"/> <property file="${user.home}/build.properties"/> <!-- ==================== File and Directory Names ======================== --> <!-- These properties generally define file and directory names (or paths) that affect where the build process stores its outputs. app.name Base name of this application, used to construct filenames and directories. Defaults to "myapp". app.path Context path to which this application should be deployed (defaults to "/" plus the value of the "app.name" property). app.version Version number of this iteration of the application. build.home The directory into which the "prepare" and "compile" targets will generate their output. Defaults to "build". catalina.home The directory in which you have installed a binary distribution of Tomcat 6. This will be used by the "deploy" target. dist.home The name of the base directory in which distribution files are created. Defaults to "dist". manager.password The login password of a user that is assigned the "manager" role (so that he or she can execute commands via the "/manager" web application) manager.url The URL of the "/manager" web application on the Tomcat installation to which we will deploy web applications and web services. manager.username The login username of a user that is assigned the "manager" role (so that he or she can execute commands via the "/manager" web application) --> <property name="app.name" value="myapp"/> <property name="app.path" value="/${app.name}"/> <property name="app.version" value="0.1-dev"/> <property name="build.home" value="${basedir}/build"/> <property name="catalina.home" value="../../../.."/> <!-- UPDATE THIS! --> <property name="dist.home" value="${basedir}/dist"/> <property name="docs.home" value="${basedir}/docs"/> <property name="manager.url" value="http://localhost:8080/manager"/> <property name="src.home" value="${basedir}/src"/> <property name="web.home" value="${basedir}/web"/> <!-- ==================== External Dependencies =========================== --> <!-- Use property values to define the locations of external JAR files on which your application will depend. In general, these values will be used for two purposes: * Inclusion on the classpath that is passed to the Javac compiler * Being copied into the "/WEB-INF/lib" directory during execution of the "deploy" target. Because we will automatically include all of the Java classes that Tomcat 6 exposes to web applications, we will not need to explicitly list any of those dependencies. You only need to worry about external dependencies for JAR files that you are going to include inside your "/WEB-INF/lib" directory. --> <!-- Dummy external dependency --> <!-- <property name="foo.jar" value="/path/to/foo.jar"/> --> <!-- ==================== Compilation Classpath =========================== --> <!-- Rather than relying on the CLASSPATH environment variable, Ant includes features that makes it easy to dynamically construct the classpath you need for each compilation. The example below constructs the compile classpath to include the servlet.jar file, as well as the other components that Tomcat makes available to web applications automatically, plus anything that you explicitly added. --> <path id="compile.classpath"> <!-- Include all JAR files that will be included in /WEB-INF/lib --> <!-- *** CUSTOMIZE HERE AS REQUIRED BY YOUR APPLICATION *** --> <!-- <pathelement location="${foo.jar}"/> --> <!-- Include all elements that Tomcat exposes to applications --> <fileset dir="${catalina.home}/bin"> <include name="*.jar"/> </fileset> <pathelement location="${catalina.home}/lib"/> <fileset dir="${catalina.home}/lib"> <include name="*.jar"/> </fileset> </path> <!-- ================== Custom Ant Task Definitions ======================= --> <!-- These properties define custom tasks for the Ant build tool that interact with the "/manager" web application installed with Tomcat 6. Before they can be successfully utilized, you must perform the following steps: - Copy the file "lib/catalina-ant.jar" from your Tomcat 6 installation into the "lib" directory of your Ant installation. - Create a "build.properties" file in your application's top-level source directory (or your user login home directory) that defines appropriate values for the "manager.password", "manager.url", and "manager.username" properties described above. For more information about the Manager web application, and the functionality of these tasks, see <http://localhost:8080/tomcat-docs/manager-howto.html>. --> <taskdef resource="org/apache/catalina/ant/catalina.tasks" classpathref="compile.classpath"/> <!-- ==================== Compilation Control Options ==================== --> <!-- These properties control option settings on the Javac compiler when it is invoked using the <javac> task. compile.debug Should compilation include the debug option? compile.deprecation Should compilation include the deprecation option? compile.optimize Should compilation include the optimize option? --> <property name="compile.debug" value="true"/> <property name="compile.deprecation" value="false"/> <property name="compile.optimize" value="true"/> <!-- ==================== All Target ====================================== --> <!-- The "all" target is a shortcut for running the "clean" target followed by the "compile" target, to force a complete recompile. --> <target name="all" depends="clean,compile" description="Clean build and dist directories, then compile"/> <!-- ==================== Clean Target ==================================== --> <!-- The "clean" target deletes any previous "build" and "dist" directory, so that you can be ensured the application can be built from scratch. --> <target name="clean" description="Delete old build and dist directories"> <delete dir="${build.home}"/> <delete dir="${dist.home}"/> </target> <!-- ==================== Compile Target ================================== --> <!-- The "compile" target transforms source files (from your "src" directory) into object files in the appropriate location in the build directory. This example assumes that you will be including your classes in an unpacked directory hierarchy under "/WEB-INF/classes". --> <target name="compile" depends="prepare" description="Compile Java sources"> <!-- Compile Java classes as necessary --> <mkdir dir="${build.home}/WEB-INF/classes"/> <javac srcdir="${src.home}" destdir="${build.home}/WEB-INF/classes" debug="${compile.debug}" deprecation="${compile.deprecation}" optimize="${compile.optimize}"> <classpath refid="compile.classpath"/> </javac> <!-- Copy application resources --> <copy todir="${build.home}/WEB-INF/classes"> <fileset dir="${src.home}" excludes="**/*.java"/> </copy> </target> <!-- ==================== Dist Target ===================================== --> <!-- The "dist" target creates a binary distribution of your application in a directory structure ready to be archived in a tar.gz or zip file. Note that this target depends on two others: * "compile" so that the entire web application (including external dependencies) will have been assembled * "javadoc" so that the application Javadocs will have been created --> <target name="dist" depends="compile,javadoc" description="Create binary distribution"> <!-- Copy documentation subdirectories --> <mkdir dir="${dist.home}/docs"/> <copy todir="${dist.home}/docs"> <fileset dir="${docs.home}"/> </copy> <!-- Create application JAR file --> <jar jarfile="${dist.home}/${app.name}-${app.version}.war" basedir="${build.home}"/> <!-- Copy additional files to ${dist.home} as necessary --> </target> <!-- ==================== Install Target ================================== --> <!-- The "install" target tells the specified Tomcat 6 installation to dynamically install this web application and make it available for execution. It does *not* cause the existence of this web application to be remembered across Tomcat restarts; if you restart the server, you will need to re-install all this web application. If you have already installed this application, and simply want Tomcat to recognize that you have updated Java classes (or the web.xml file), use the "reload" target instead. NOTE: This target will only succeed if it is run from the same server that Tomcat is running on. NOTE: This is the logical opposite of the "remove" target. --> <target name="install" depends="compile" description="Install application to servlet container"> <deploy url="${manager.url}" username="${manager.username}" password="${manager.password}" path="${app.path}" localWar="file://${build.home}"/> </target> <!-- ==================== Javadoc Target ================================== --> <!-- The "javadoc" target creates Javadoc API documentation for the Java classes included in your application. Normally, this is only required when preparing a distribution release, but is available as a separate target in case the developer wants to create Javadocs independently. --> <target name="javadoc" depends="compile" description="Create Javadoc API documentation"> <mkdir dir="${dist.home}/docs/api"/> <javadoc sourcepath="${src.home}" destdir="${dist.home}/docs/api" packagenames="*"> <classpath refid="compile.classpath"/> </javadoc> </target> <!-- ====================== List Target =================================== --> <!-- The "list" target asks the specified Tomcat 6 installation to list the currently running web applications, either loaded at startup time or installed dynamically. It is useful to determine whether or not the application you are currently developing has been installed. --> <target name="list" description="List installed applications on servlet container"> <list url="${manager.url}" username="${manager.username}" password="${manager.password}"/> </target> <!-- ==================== Prepare Target ================================== --> <!-- The "prepare" target is used to create the "build" destination directory, and copy the static contents of your web application to it. If you need to copy static files from external dependencies, you can customize the contents of this task. Normally, this task is executed indirectly when needed. --> <target name="prepare"> <!-- Create build directories as needed --> <mkdir dir="${build.home}"/> <mkdir dir="${build.home}/WEB-INF"/> <mkdir dir="${build.home}/WEB-INF/classes"/> <!-- Copy static content of this web application --> <copy todir="${build.home}"> <fileset dir="${web.home}"/> </copy> <!-- Copy external dependencies as required --> <!-- *** CUSTOMIZE HERE AS REQUIRED BY YOUR APPLICATION *** --> <mkdir dir="${build.home}/WEB-INF/lib"/> <!-- <copy todir="${build.home}/WEB-INF/lib" file="${foo.jar}"/> --> <!-- Copy static files from external dependencies as needed --> <!-- *** CUSTOMIZE HERE AS REQUIRED BY YOUR APPLICATION *** --> </target> <!-- ==================== Reload Target =================================== --> <!-- The "reload" signals the specified application Tomcat 6 to shut itself down and reload. This can be useful when the web application context is not reloadable and you have updated classes or property files in the /WEB-INF/classes directory or when you have added or updated jar files in the /WEB-INF/lib directory. NOTE: The /WEB-INF/web.xml web application configuration file is not reread on a reload. If you have made changes to your web.xml file you must stop then start the web application. --> <target name="reload" depends="compile" description="Reload application on servlet container"> <reload url="${manager.url}" username="${manager.username}" password="${manager.password}" path="${app.path}"/> </target> <!-- ==================== Remove Target =================================== --> <!-- The "remove" target tells the specified Tomcat 6 installation to dynamically remove this web application from service. NOTE: This is the logical opposite of the "install" target. --> <target name="remove" description="Remove application on servlet container"> <undeploy url="${manager.url}" username="${manager.username}" password="${manager.password}" path="${app.path}"/> </target> </project>

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  • Add comma-separated value of grouped rows to existing query

    - by Peter Lang
    I've got a view for reports, that looks something like this: SELECT a.id, a.value1, a.value2, b.value1, /* (+50 more such columns)*/ FROM a JOIN b ON (b.id = a.b_id) JOIN c ON (c.id = b.c_id) LEFT JOIN d ON (d.id = b.d_id) LEFT JOIN e ON (e.id = d.e_id) /* (+10 more inner/left joins) */ It joins quite a few tables and returns lots of columns, but indexes are in place and performance is fine. Now I want to add another column to the result, showing comma-separated values ordered by value from table y outer joined via intersection table x if a.value3 IS NULL, else take a.value3 To comma-separate the grouped values I use Tom Kyte's stragg, could use COLLECT later. Pseudo-code for the SELECT would look like that: SELECT xx.id, COALESCE( a.value3, stragg( xx.val ) ) value3 FROM ( SELECT x.id, y.val FROM x WHERE x.a_id = a.id JOIN y ON ( y.id = x.y_id ) ORDER BY y.val ASC ) xx GROUP BY xx.id What is the best way to do it? Any tips?

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  • SQL 2003 Distance Latitude Longitude

    - by J.Hendrix
    I have a table full of Dealers along with their latitude and longitude. I am trying to determine the top n closest dealers to any given lat and lon. I already have the function to calculate distance between locations, but I want to do as few calculations as possible (my table can contain many thousands of entries). Currently I have to calculate the distance for each entry then sort them. Is there any way to sort before I do the calculation to improve performance? This question is good, but I will not always know my range. Should I just pick an arbitrarily high range then refine my results? I am thankful for any help the community can offer. declare @Lat real declare @lon real Set @lat = 41.05 Set @lon = -73.53 SELECT top 10 MemberID, Address1, City, State, Zip, Phone, Lat, Lon, (SELECT fun_DistanceLatLon] (@Lat,@lon,Lat,Lon)) as mDistance --Calculate distance FROM Dealers Order by (SELECT fun_DistanceLatLon] (@Lat,@lon,Lat,Lon))

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  • 'Getting Started with Oracle Data Integrator 11g: A Hands-On Tutorial' book is now available

    - by Julien Testut
    We are pleased to announce the availability of the first book on Oracle Data Integrator published by Packt Publishing:  Getting Started with Oracle Data Integrator 11g – A Hands-On Tutorial Authors: Peter C. Boyd-Bowman, Christophe Dupupet, Denis Gray, David Hecksel,  Julien Testut, Bernard Wheeler. Congratulations to everyone who contributed to this book! You can get more information about 'Getting Started with Oracle Data Integrator 11g – A Hands-On Tutorial' including the table of contents and a sample chapter at http://www.packtpub.com/oracle-data-integrator-11g-getting-started/book. The book is available on Amazon.com, Amazon.co.uk, Barnes & Noble and Safari Books Online.

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  • Creating a new record using AJAX in ASP.NET-MVC

    - by RememberME
    I am having the hardest time wrapping my head around this. I recently asked this question Create/Edit/Save data in a jQuery pop-up for ASP.NET-MVC and Linq2Sql I'm sure that the response is the right way to go, but I just can't figure out how to write the back-end code to make it work. I originally made my site by following the nerddinner tutorial. I have a subcontracts model and a subcontracts controller. On my subcontract entry page, I'd like for there to be a pop-up/dialog box where the user can enter a new company if the company isn't already in the drop-down list. Do I need to create a new company controller? I wouldn't have a company model b/c the company table is linked to my subcontracts table within the subcontracts dbml. Can anyone point me to an example somewhere? Or offer any help.

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  • Compound IDENTITY column in SQL SERVER 2008

    - by Asaf R
    An Orders table has a CustomerId column and an OrderId column. For certain reasons it's important that OrderId is no longer than 2-bytes. There will be several million orders in total, which makes 2-bytes not enough. A customer will have no more than several thousand orders making 2-bytes enough. The obvious solution is to have the (CustomerId, OrderId) be unique rather than (OrderId) itself. The problem is generating the next Customer's OrderId. Preferably, without creating a separate table for each customer (even if it contains only an IDENTITY column), in order to keep the upper layers of the solution simple. Q: how would you generate the next OrderId so that (CustomerId, OrderId) is unique but OrderId itself is allowed to have repetitions? Does Sql Server 2008 have a built in functionality for doing this? For lack of a better term I'm calling it a Compound IDENTITY column.

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  • Databound Checkbox list with textboxes in a webform

    - by zSysop
    Hi all, I'm having trouble coming up with a solution for the following problem and i was wondering if someone here would help me out. I need to pull a list of supplies from a db table and list them along with two textboxes (one for quantity, and another for manufacturer) so the list would look something like this. checkbox for supply 1 | Quantity | Manufacturer checkbox for supply 2 | Quantity | Manufacturer .. I also need to store all of the checked items in a db table. I'm not sure how i should go about doing this. I've heard some talk about a repeater control being useful but i've not come across any examples that do this type of thing. Thanks in advance

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  • Best Practise to populate Fact and Dimension Tables from Transactional Flat DB

    - by alex25
    Hi! I want to populate a star schema / cube in SSIS / SSAS. I prepared all my dimension tables and my fact table, primary keys etc. The source is a 'flat' (item level) table and my problem is now how to split it up and get it from one into the respective tables. I did a fair bit of googling but couldn't find a satisfying solution to the problem. One would imagine that this is a rather common problem/situation in BI development?! Thanks, alexl

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  • Grails multiple databases

    - by srinath
    Hi, how can we write queries on 2 databases . I installed datasources plugin and domain classes are : class Organization { long id long company_id String name static mapping = { version false table 'organization_' id column : 'organizationId' company_id column : 'companyId' name column : 'name' } } class Assoc { Integer id Integer association_id Integer organization_id static mapping = { version false table 'assoc' id column : 'ASSOC_ID' association_id column : 'ASSOCIATION_ID' organization_id column : 'ORGANIZATION_ID' } } this is working : def org = Organization.list() def assoc = Assoc.list() and this is not working : def query = Organization.executeQuery("SELECT o.name as name, o.id FROM Organization o WHERE o.id IN (SELECT a.organization_id FROM Assoc a )") error : org.hibernate.hql.ast.QuerySyntaxException: Assoc is not mapped [SELECT o.name as name, o.id FROM org.com.domain.Organization o WHERE o.id IN (SELECT a.organization_id FROM AssocOrg a )] How can we connect with 2 databases using single query ? thanks in advance .

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  • How to set up an insert to a grails created file with next sequence number?

    - by Jack BeNimble
    I'm using a JMS queue to read from and insert data into a postgres table created by grails. The problem is obtaining the next sequence value. I thought I had found the solution with the following statement (by putting "DEFAULT" where the ID should go), but it's no longer working. I must have changed something, because I needed to recreate the table. What's the best way to get around this problem? ps = c.prepareStatement("INSERT INTO xml_test (id, version, xml_text) VALUES (DEFAULT, 0, ?)"); UPDATE: In response to the suggested solution, I did the following: Added this to the the domain: class XmlTest { String xmlText static constraints = { id generator:'sequence', params:[name:'xmltest_sequence'] } } And changed the insert statement to the following: ps = c.prepareStatement("INSERT INTO xml_test (id, version, xml_text) VALUES (nextval('xmltest_sequence'), 0, ?)"); However, when I run the statement, I get the following error: [java] 1 org.postgresql.util.PSQLException: ERROR: relation "xmltest_sequence" does not exist Any thoughts?

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  • Correct way to edit and update complex viewmodel objects using asp.net-mvc2 and entity framework

    - by jslatts
    I have a table in my database with a one to many relationship to another table: ParentObject ID Name Description ChildObject ID Name Description ParentObjectID AnotherObjectID The objects are mapped into Entity Framework and exposed through a data access class. It seemed like ViewModels are recommended when the data to be displayed greatly differs from the domain object, so I created a ViewModel as follows: public class ViewModel { public IList<ParentObject> ParentObjects { get; set; } public ParentObject selectedObject { get; set; } public IList<ChildObject> ChildObjects { get; set; } } I have a view that displays a list of ParentObjects and when clicked will allow a ChildObject to be modified saved. <% using (Html.BeginForm()) { %> <table> <% foreach (var parent in Model.ParentObjects) { %> <tr> <td> ObjectID [<%= Html.Encode(parent.ID)%>] </td> <td> <%= Html.Encode(parent.Name)%> </td> <td> <%= Html.Encode(parent.Description)%> </td> </tr> <% } %> </table> <% if (Model.ParentObject != null) { %> <div> Name:<br /> <%= Html.TextBoxFor(model => model.ParentObject.Name) %> <%= Html.ValidationMessageFor(model => model.ParentObject.Name, "*")%> </div> <div> Description:<br /> <%= Html.TextBoxFor(model => model.ParentObject.Description) %> <%= Html.ValidationMessageFor(model => model.ParentObject.Description, "*")%> </div> <div> Child Objects </div> <% for (int i = 0; i < Model.ParentObject.ChildObjects.Count(); i++) { %> <div> <%= Html.DisplayTextFor(sd => sd.ChildObjects[i].Name) %> </div> <div> <%= Html.HiddenFor(sd => sd.ChildObjects[i].ID )%> <%= Html.TextBoxFor( sd => sd.ChildObjects[i].Description) %> <%= Html.ValidationMessageFor(sd => sd.ChildObjects[i].Description, "*") %> </div> <% } } } %> This all works fine. My question is around the best way to update the EF objects and persist the changes back to the database. I initially tried: [HttpPost] public ActionResult Edit(ViewModel viewModel) { ParentObject parent = myRepository.GetParentObjectByID(viewModel.SelectedObject.ID); if ((!ModelState.IsValid) || !TryUpdateModel(parent, "SelectedObject", new[] { "Name", "Description" })) { || !TryUpdateModel(parent.ChildObjects, "ChildObjects", new[] { "Name", "Description" })) { //Code to handle failure and return the current model snipped return View(viewModel); } myRepository.Save(); return RedirectToAction("Edit"); } When I try to save a change to the child object, I get this exception: Entities in 'MyEntities.ChildObject' participate in the 'FK_ChildObject_AnotherObject' relationship. 0 related 'AnotherObject' were found. 1 'AnotherObject' is expected. Investigation on StackOverflow and generally googling led me to this blog post that seems to describe my problem: TryUpdateModel() does not correctly handle nested collections. Apparently, (and stepping through the debugger confirms this) it creates a new ChildObject instead of associating with the EF objects from my instantiated context. My hacky work around is this: if (viewModel.ChildObjects.Count > 0) { foreach (ChildObject modelChildObject in viewModel.ChildObjects) { ChildObject childToUpdate = ParentObject.ChildObject.Where(a => a.ID == modelChildObject.ID).First(); childToUpdate.Name = modelChildObject.Name; } } This seems to work fine. My question to you good folks: Is there correct way to do this? I tried following the suggestion for making a custom model binder per the blog link I posted above but it didn't work (there was an issue with reflection) and I needed to get something going ASAP. PS - I tried to cleanup the code to hide specific information, so beware I may have hosed something up. I mainly just want to know if other people have solved this problem. Thanks!

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  • UITableView details as a subview

    - by Leonardo
    Hi all, I have a UITableView in iPhone with enough cell to make it scrollable. I would like to have a subview display whenever I click on a cell, rather than using the navigation controller behaviour. The problem is that I cannot calculate the CGRect exactly to have the subview always centered in page, because the CGRect is calculated from top of table, and if I scroll table and click cell, the subview will be added out of screen. The solution could be easy, but I don't know if it's possible: identify the portion of the current viewable area of the UITableView and obtain in some way the frame and therefore origin and size, then build a subview based on such coordinates. Do you think it's possible without writing not too much code ? thanks Leonardo

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  • Parsing plain Win32 PE File (Exe/DLL) in C#.NET

    - by Usman
    Hello, I need to parse plain Win32 DLL/Exe and need to get all imports and exports from it and to show it on console or GUI(say Win Forms). Is it possible to parse Win32 DLL/Exe in C#.NET, read its export table,import table and get managed types from it. As its unmanaged PE(.NET doesn't allows you to convert unmanaged PE files to managed .NET assemblies, only it generates COM managed assemblies). So how to parse export and import tables of PE files and take all methods(signatures from it) in managed form.(e.g if char* as argument, it should display as IntPtr) Regards Usman

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  • Reordering items in mobilesafari

    - by Marek
    After searching around i still have no clue about the best practice to reorder a set of items in mobile safari. I'm currently using, in the desktop version of my webapplication, jQuery sortable function applied to a set of table rows, with an ajax callback to update items positioning. What would be the best way of doing this in mobile safari through jquery or plain javascript? The table is longer then the screen, so also the normal scrolling should be present. Other approaches that are usable and do not make use of drag and dropping are also welcome. Thanks.

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  • Linq-to-sql Compiled Query is returning result from different DataContext

    - by Vladimir Kojic
    Compiled query: public static Func<OperationalDataContext, short, Machine> QueryMachineById = CompiledQuery.Compile((OperationalDataContext db, short machineID) => db.Machines.Where(m => m.MachineID == machineID).SingleOrDefault()); It looks like compiled query is caching Machine object and returning the same object even if query is called from new DataContext (I’m disposing DataContext in the service but I’m getting Machine from previous DataContext). I use POCOs and XML mapping. Revised: It looks like compiled query is returning result from new data context and it is not using the one that I passed in compiled-query. Therefore I can not reuse returned object and link it to another object obtained from datacontext thru non compiled queries. I’m using unit of work pattern : // First Call Using(new DataContext) { Machine from DataContext.Table == machine from cached query } // Do some work // Second Call is failing Using(new DataContext) { Machine from DataContext.Table <> machine from cached query }

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  • doofus ASP.Net master page scrollbar question

    - by Stephen Falken
    Like happens to all of us sometimes, I inherited some crappy code I have to fix. We need to center our pages on widescreen machines, so we have a master page layout div like so: .MasterLayout { width:1100px; height: 100%; position:absolute; left:50%; margin-left:-550px; vertical-align:top; } I removed most of the detailed attributes for readability here, but here's how the table for the master page is laid out: <table border="0" cellpadding="0" cellspacing="0" style="width: 100%;"> <tr> <td style="width: 100%" align="center" colspan="2"> </td> </tr> <tr> <td colspan="2" style="height: 20px; background-color: #333;"> <asp:SiteMapPath/> </td> </tr> <tr> <td style="width: 86px; height: 650px; background-color: #B5C7DE; margin: 6px;" valign="top"> <asp:Menu /> <asp:SiteMapDataSource /> </td> <td style="background-color:#ffffff; margin:5px; width:1000px;" valign="top"> <asp:contentplaceholder id="ContentPlaceHolder1" runat="server"/> </td> </tr> </table> When resizing the browser window, the horizontal scrollbar only reaches as far as the left edge of the <asp:contentplaceholder/> control, and the <asp:menu/> that's in the 86px wide <td> is hidden. How can I fix this problem? THANKS IN ADVANCE

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  • mysql first record retrieval

    - by Sammy
    While very easy to do in Perl or PHP, I cannot figure how to use mysql only to extract the first unique occurence of a record. For example, given the following table: Name Date Time Sale John 2010-09-12 10:22:22 500 Bill 2010-08-12 09:22:37 2000 John 2010-09-13 10:22:22 500 Sue 2010-09-01 09:07:21 1000 Bill 2010-07-25 11:23:23 2000 Sue 2010-06-24 13:23:45 1000 I would like to extract the first record for each individual in asc time order. After sorting the table is ascending time order, I need to extract the first unique record by name. So the output would be : Name Date Time Sale John 2010-09-12 10:22:22 500 Bill 2010-07-25 11:23:23 2000 Sue 2010-06-24 13:23:45 1000 Is this doable in an easy fashion with mySQL? Thanks, Sammy

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  • Visualforce dataTable: is there a way to stop it from rendering cellpadding attribute?

    - by codeulike
    In Visualforce, I'm using an <apex:dataTable> component as follows: <apex:dataTable value="{!Qualifications}" var="qual" styleClass="cv_table" > <!-- etc... --> ... and then I'm using CSS to style the table, via the class name. Trouble is, VisualForce renders HTML like this: <table class="cv_table" id="j_id0:j_id26" border="0" cellpadding="0" cellspacing="0"> <!-- etc... --> The class attribute is there as I wanted, but there's also cellpadding and cellspacing specified, that interfere with my CSS. Is there a way to stop Visualforce from rendering the cellpadding and cellspacing attributes for an <apex:dataTable>?

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  • Advice on displaying and allowing editing of data using ASP.NET MVC?

    - by Remnant
    I am embarking upon my first ASP.NET MVC project and I would like to get some input on possible ways to display database data and general best practice. In short, the body of my webpage will show data from my database in a table like format, with each table row showing similar data. For example: Name Age Position Date Joined Jon Smith 23 Striker 18th Mar 2005 John Doe 38 Defender 3rd Jan 1988 In terms of functionality, primarily I’d like to give the user the ability to edit the data and, after the edit, commit the edit to the database and refresh the view.The reason I want to refresh the view is because the data is date ordered and I will need to re-sort if the user edits a date field. My main question is what architecture / tools would be best suited to this fulfil my requirements at a high level? From the research I have done so far my initial conclusions were: ADO.NET for data retrieval. This is something I have used before and feel comfortable with. I like the look of LINQ to SQL but don’t want to make the learning curve any steeper for my first outing into MVC land just yet. Partial Views to create a template and then iterate through a datatable that I have pulled back from my database model. jQuery to allow the user to edit data in the table, error check edited data entries etc. Also, my intial view was that caching the data would not be a key requirement here. The only field a user will be able to update is the field and, if they do, I will need to commit that data to the database immediately and then refresh the view (as the data is date sorted). Any thoughts on this? Alternatively, I have seen some jQuery plug-ins that emulate a datagrid and provide associated functionality. My first thoughts are that I do not need all the functionality that comes with these plug-ins (e.g. zebra striping, ability to sort by column using sort glyph in column headers etc .) and I don’t really see any benefit to this over and above the solution I have outlined above. Again, is there reason to reconsider this view? Finally, when a user edits a date , I will need to refresh the view. In order to do this I had been reading about Html.RenderAction and this seemed like it may be a better option than using Partial Views as I can incorporate application logic into the action method. Am I right to consider Html.RenderAction or have I misunderstood its usage? Hope this post is clear and not too long. I did consider separate posts for each topic (e.g. Partial View vs. Html.RenderAction, when to use jQury datagrid plug-in) but it feels like these issues are so intertwined that they need to be dealt with in contect of each other. Thanks

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  • Displaying most popular posts on my blog - Ruby on Rails

    - by bgadoci
    I have created a simple blog application using Ruby on Rails, both of which I am new to. I am trying to get my most 'voted' posts to display in my /views/posts/index.html.erb view. Here are the basics. I have created a votes table and successfully allow a user to 'vote' for a post on the /views/posts/show.html.erb page. When they vote, it passes '1' to the votes table and I return the vote count via ajax to the same show page. Vote belongs_to :post and Post has_many :votes. I would like to display in /views/posts/index.html.erb the post title and the amount of times it has been voted for, ordered by posts with the highest vote count. Any ideas on how to do this?

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