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  • IDataServiceMetadataProvider / ResourceType.... what for dynamic types with no CLR type?

    - by TomTom
    Hello, I try to expose a database via ADO RIA for which we have only an ODBC based interface. The "database" is a server and new elements are developped all the time, so I would like the server to check metadata at start (using the odbc schema methods) and then expose what he finds via RIA services.... clients can the nregenerate when they need access to new elements. As such, I dont ahve any CLR types for all the tabled developped. ResourceType tableType = new ResourceType( typeof(object), ResourceTypeKind.EntityType, null, "Martini", table_name, false ); tableType.CanReflectOnInstanceType = false; I can somehow not put in NULl as CLR element type, and entering typeof(object) seems to result in reflection errors when trying to access the properties. Any documentation on how to do that? I dont really want to get into having types... though if I have to, I probably will dynamically generate some via bytecode emit.

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  • Host SilverLight / WCF

    - by martin
    Hi all I have created my first silverlight app :-) It has a basic page and connects to a db to populate a list. the connection is done using wcf, so my silverlight connects to a ServiceReference that does the stuff. This all works fine when i run from VisualStudio. My problem is that i am not sure how to host this app. I created an account on aspspider uploaded my default.html, zap file(which i renamed to zip), and Database. this work fine until it needs to connect to the db. What do i need to upload to get the database connection working ? Thanks :-) Martin

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  • Managing a difficult manager

    - by griegs
    I have a situation here at work. We are redeveloping our basic architecture across the entire company. Currently we have the following hierarchy; SQL Database <= Stored Procs not allowed. nHibernate Classes to convert nHibernate into our own objects Web Service <= for all external and [internal] calls. Class to take objects from Web Service and back into our own objects and then… Normal nTier application architecture such as Data Transformation Layer, Business layer etc. Within the database, when we are writing a hierarchy of objects to the database, say for example; Order Person Details Address Product Other We need to serialise the object and save it, in its entirety, to an image field in a table. No attempt has been made to store the objects in their own tables so that we can do useful stuff like report on it. This is an architecture that was implemented [way] before I started and as you can probably appreciate, is a complete nightmare not to mention slow as a wet weekend. We’re not even allowed to have stored procs within SQL server because in my boss’s last job they had a hundred or so and he had a problem identifying them all so therefore all stored procs are the devil. Now the same person that developed the above architecture has developed the new one. It came as no surprise that he’s essentially used the same framework only now it’s using DotNet 3.5 with interfaces and generics. We still have to go through web services, still need to serialise (everything), still not allowed to use stored procs etc. In fact, we’re only barely able to bang two rocks together here. He says to us that the framework is open for discussion but when you discuss it, unless you approve of his design, you are told flatly “No”. He simply won’t listen to any other suggestions. Even when you show him demo applications of his proposed architecture v’s yours and he can see the speed difference, he still won’t take that on board. So I guess my question is, and I know others have experienced the same things out there, how do I get through to someone like this? How do you convince someone to ditch Web Services for internal calls and applications? How do you demonstrate, and make it stick, that stored procs are a better way to go than ad-hoc sql statements? This is killing me. I don’t want to repeat the mistakes of the past and I certainly don’t want to write code that I know is going to be slow and cumbersome. Help!

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  • MySQL auto increment

    - by mouthpiec
    Hi, I have table with an auto-increment field, but I need to transfer the table to another table on another database. Will the value of field 1 be 1, that of field 2 be 2, etc? Also in case the database get corrupted and I need to restore the data, will the auto-increment effect in some way? will the value change? (eg if the first row, id (auto-inc) = 1, name = john, country = UK .... will the id field remain 1?) I am asking because if other table refer to this value, all data will get out of sync if this field change.

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  • Proper way to set class variables

    - by ensnare
    I'm writing a class to insert users into a database, and before I get too far in, I just want to make sure that my OO approach is clean: class User(object): def setName(self,name): #Do sanity checks on name self._name = name def setPassword(self,password): #Check password length > 6 characters #Encrypt to md5 self._password = password def commit(self): #Commit to database >>u = User() >>u.setName('Jason Martinez') >>u.setPassword('linebreak') >>u.commit() Is this the right approach? Should I declare class variables up top? Should I use a _ in front of all the class variables to make them private? Thanks for helping out.

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  • Sonar default, meet "container state was: CONSTRUCTED"

    - by larry cai
    Environment: hudson/sonar/maven2 in ubuntu locally with default parameters And I got the log from hudson below, I can't figure out where is the problem. [INFO] Sonar host: http://localhost:9000 [INFO] Sonar version: 2.0.1 [INFO] [sonar-core:internal {execution: default-internal}] [INFO] Database dialect class org.sonar.api.database.dialect.Derby [INFO] ------------- Analyzing Game of Life business logic module [INFO] ------------------------------------------------------------------------ [ERROR] BUILD ERROR [INFO] ------------------------------------------------------------------------ [INFO] Can not execute Sonar Embedded error: Can not analyze the project Cannot stop. Current container state was: CONSTRUCTED [INFO] ------------------------------------------------------------------------ [INFO] Trace org.apache.maven.lifecycle.LifecycleExecutionException: Can not execute Sonar And I notice it also has problem when run it command line without hudson mvn sonar:sonar

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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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  • How to optimize Core Data query for full text search

    - by dk
    Can I optimize a Core Data query when searching for matching words in a text? (This question also pertains to the wisdom of custom SQL versus Core Data on an iPhone.) I'm working on a new (iPhone) app that is a handheld reference tool for a scientific database. The main interface is a standard searchable table view and I want as-you-type response as the user types new words. Words matches must be prefixes of words in the text. The text is composed of 100,000s of words. In my prototype I coded SQL directly. I created a separate "words" table containing every word in the text fields of the main entity. I indexed words and performed searches along the lines of SELECT id, * FROM textTable JOIN (SELECT DISTINCT textTableId FROM words WHERE word BETWEEN 'foo' AND 'fooz' ) ON id=textTableId LIMIT 50 This runs very fast. Using an IN would probably work just as well, i.e. SELECT * FROM textTable WHERE id IN (SELECT textTableId FROM words WHERE word BETWEEN 'foo' AND 'fooz' ) LIMIT 50 The LIMIT is crucial and allows me to display results quickly. I notify the user that there are too many to display if the limit is reached. This is kludgy. I've spent the last several days pondering the advantages of moving to Core Data, but I worry about the lack of control in the schema, indexing, and querying for an important query. Theoretically an NSPredicate of textField MATCHES '.*\bfoo.*' would just work, but I'm sure it will be slow. This sort of text search seems so common that I wonder what is the usual attack? Would you create a words entity as I did above and use a predicate of "word BEGINSWITH 'foo'"? Will that work as fast as my prototype? Will Core Data automatically create the right indexes? I can't find any explicit means of advising the persistent store about indexes. I see some nice advantages of Core Data in my iPhone app. The faulting and other memory considerations allow for efficient database retrievals for tableview queries without setting arbitrary limits. The object graph management allows me to easily traverse entities without writing lots of SQL. Migration features will be nice in the future. On the other hand, in a limited resource environment (iPhone) I worry that an automatically generated database will be bloated with metadata, unnecessary inverse relationships, inefficient attribute datatypes, etc. Should I dive in or proceed with caution?

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  • Preserving text formatting for dynamic website

    - by Mohit
    Hello Folks, I am facing a problem while creating a dynamic website. I am building it for some pharma company, which have many products. The problem is, every product have different sections of description, and have to be formatted differently. I wanted to store all the product descriptions in the database, but at the same time preserve the formatting of each description. I also plan to provide an admin interface, where they could edit the product information themselves. I could use Joomla or any other CMS for that purpose, but i wanted to know if i want to build such a system of my own, where i could format the text in an editor and them save that thing into database and when i retrieve it, i get the same formatting. How could i do this? Also i wanted to do this in PHP. Thanks -- Mohit

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  • Secure ajax form POST

    - by user194630
    I was wondering how to develop a secure form post through AJAX. For example, i have: My HTML form. My JavaScript handling the submit. The submit url is "post_data.php" The posted data is: id=8&name=Denis The PHP verifies if variables id and name are POSTED and their data type. If this is ok it proceed to do some stuff on a database. My question is, how can i prevent someone from creating his own html form, outside my web site, or whatever, and posting false data to my PHP script? Imagine that data realy exists on my database, this could be bad. Thanks

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  • mysql good way of programing

    - by Syom
    i have the video gallery in my database, which has over 200 000 videos. in my home page in the site i show exactly some videos, which must satisfy to some criteria. and so, what is the question. is it a good way to sort videos every time the home page opene, or i must save the sort results somewhere in the database, and refresh them only if something change. i think it can save me a lot of time. what you think about it. thanks in advance.

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  • SSRS 2008 - Textbox RTF

    - by Iceman
    Hello, We have rtf text stored in our database that looks like the following: {\rtf1\ansi\deff0{\fonttbl{\f0\fnil\fcharset0 MS Sans Serif;}{\f1\fnil MS Sans Serif;}} {\colortbl ;\red0\green0\blue0;} \viewkind4\uc1\pard\cf1\lang1033\f0\fs22 Some Text Here \f1 \par } It is my understanding that SSRS 2008 should be able to properly display this on a report. Has anyone been able to have this display correctly? Robert Bruckner's Advanced Reporting Services Blog A new feature of SSRS: Leverage the enhanced Textbox (aka "RichText") to define mixed formatting within the same textbox. In addition, HTML strings of text can be imported into the report from a database or other source. Any help is greatly appreciated.

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  • C# Change dynamically NavigateUrl HyperLinkField

    - by Martijn
    Hi, In my code i create a HyperLinkField object. Depending on a database field value, i want to set the NavigateUrl property. This is my problem, i don't know how. With: objHF.DataNavigateUrlFields = new[] { "id", "Stype" }; i get my database field. Now i want to check the Stype value. Depeding on this value i want to set the page where to navigate to. How can i do this?? At the end i set my datasource to the gridview and after that i call the bind() method. I hope someone can help me out

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  • SQL 2005 indexed queries slower than unindexed queries

    - by uos??
    Adding a seemingly perfectly index is having an unexpectedly adverse affect on a query performance... -- [Data] has a predictable structure and a simple clustered index of the primary key: ALTER TABLE [dbo].[Data] ADD PRIMARY KEY CLUSTERED ( [ID] ) -- My query, joins on itself looking for a certain kind of "overlapping" records SELECT DISTINCT [Data].ID AS [ID] FROM dbo.[Data] AS [Data] JOIN dbo.[Data] AS [Compared] ON [Data].[A] = [Compared].[A] AND [Data].[B] = [Compared].[B] AND [Data].[C] = [Compared].[C] AND ([Data].[D] = [Compared].[D] OR [Data].[E] = [Compared].[E]) AND [Data].[F] <> [Compared].[F] WHERE 1=1 AND [Data].[A] = @A AND @CS <= [Data].[C] AND [Data].[C] < @CE -- Between a range [Data] has about a quarter-million records so far, 10% to 50% of the data satisfies the where clause depending on @A, @CS, and @CE. As is, the query takes 1 second to return about 300 rows when querying 10%, and 30 seconds to return 3000 rows when querying 50% of the data. Curiously, the estimated/actual execution plan indicates two parallel Clustered Index Scans, but the clustered index is only of the ID, which isn't part of the conditions of the query, only the output. ?? If I add this hand-crafted [IDX_A_B_C_D_E_F] index which I fully expected to improve performance, the query slows down by a factor of 8 (8 seconds for 10% & 4 minutes for 50%). The estimated/actual execution plans show an Index Seek, which seems like the right thing to be doing, but why so slow?? CREATE UNIQUE INDEX [IDX_A_B_C_D_E_F] ON [dbo].[Data] ([A], [B], [C], [D], [E], [F]) INCLUDE ([ID], [X], [Y], [Z]); The Data Engine Tuning wizard suggests a similar index with no noticeable difference in performance from this one. Moving AND [Data].[F] <> [Compared].[F] from the join condition to the where clause makes no difference in performance. I need these and other indexes for other queries. I'm sure I could hint that the query should refer to the Clustered Index, since that's currently winning - but we all know it is not as optimized as it could be, and without a proper index, I can expect the performance will get much worse with additional data. What gives?

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  • Specify which row to return on SQLite Group By

    - by lozzar
    I'm faced with a bit of a difficult problem. I store all the versions of all documents in a single table. Each document has a unique id, and the version is stored as an integer which is incremented everytime there is a new version. I need a query that will only select the latest version of each document from the database. While using GROUP BY works, it appears that it will break if the versions are not inserted in the database in the order of version (ie. it takes the maximum ROWID which will not always be the latest version). Note, that the latest version of each document will most likely be a different number (ie. document A is at version 3, and document B is at version 6). I'm at my wits end, does anybody know how to do this (select all the documents, but only return a single record for each document_id, and that the record returned should have the highest version number)?

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  • Updating Checked Checkboxes using CodeIgniter + MySQL

    - by Tim
    Hello I have about 8 check boxes that are being generated dynamically from my database. This is the code in my controller //Start Get Processes Query $this->db->select('*'); $this->db->from('projects_processes'); $this->db->where('process_enabled', '1'); $data['getprocesses'] = $this->db->get(); //End Get Processes Query //Start Get Checked Processes Query $this->db->select('*'); $this->db->from('projects_processes_reg'); $this->db->where('project_id', $project_id); $data['getchecked'] = $this->db->get(); //End Get Processes Query This is the code in my view. <?php if($getprocesses->result_array()) { ?> <?php foreach($getprocesses->result_array() as $getprocessrow): ?> <tr> <td><input <?php if($getchecked->result_array()) { foreach($getchecked->result_array() as $getcheckedrow): if($getprocessrow['process_id'] == $getcheckedrow['process_id']) { echo 'checked'; } endforeach; }?> type="checkbox" name="progresscheck[]" value="<?php echo $getprocessrow['process_id']; ?>"><?php echo $getprocessrow['process_name']; ?><br> </td> </tr> <?php endforeach; ?> This generates the checkboxes into the form and also checks the appropriate ones as specified by the database. The problem is updating them. What I have been doing so far is simply deleting all checkbox entries for the project and then re-inserting all the values into the database. This is bad because 1. It's slow and horrible. 2. I lose all my meta data of when the check boxes were checked. So I guess my question is, how do I update only the checkboxes that have been changed? Thanks, Tim

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  • ORM in the realworld

    - by josh
    I am begining a new project that i think will last for some years. Am in the point of deciding the ORM framework to use (or whether to use one at all). Can anyone with experience tell me whether orm frameworks are used in realworld applications. The problem i have in mind is this: The orm tool will generate for me tables and columns etc as i create and modify my entities. However, after the project has gone live and is in production, certain database changes will not be possible. Can this hinder the advancement of the project. If i had used a framework like ibatis for example, i know i would only need to adjust the sql statements based on the database changes. Can someone tell me whether ORM tools have survived the live environment. At my office, we use java based ERP that was done long ago and it was never done using any ORM framework. Regards. Josh

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  • jqgrid ASP.NET MVC -- getting data right for the grid.

    - by SamM09
    Here is my dilemma, I have not been able to manipulate my data to a form fitting to jqgrid standards. This is my first time using the jqgrid and I've spent a lot of time reading up on it. My js code is as follows: jQuery("#list").jqGrid({ url: '/Home/ListContacts/', dataType: "json", contentType: "application/json; charset=utf-8", mtype: 'POST', colNames: ['First Name', 'MI', 'Last Name'], colModel: [ { name: 'First Name', index: 'FName', width: 40, align: 'left' }, { name: 'MI', index: 'MInitial', width: 40, align: 'left' }, { name: 'Last Name', index: 'LName', width: 400, align: 'left'}], pager: jQuery('#pager'), rowNum: 10, rowList: [5, 10, 20, 50], sortname: 'Id', sortorder: "desc", repeatitems: false, viewrecords: true, imgpath: '/scripts/themes/basic/images', caption: 'My first grid' }); }); what im getting from the database: [["4","Jenna","Mccarthy"],["56","wer","weoiru"]] Now correct me if I am wrong, but the index: in my colModel refers to the column names in my database right? Could someone point to a reference that is straight forward or just start me off with this I would be most grateful.

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  • A cycle in object graph detected in JPA.

    - by Nitesh Panchal
    Hello, I am trying to figure out this error since 5 hours without any success. SO i finally thought of posting in here. Please help i am really in big trouble. I am stuck on this and see no way of solving this error. This is my database structure tblBlogRegion BlogRegionId (primary key) BlogRegionName tblGadget GadgetId(primary key) GadgetName tblBlogs BlogId(primary key) Blogname BlogTypeId (reference key from tblSiteTerm tblSiteTerms SiteTermsId(primary key) SiteTermsName tblBlogGadgets BlogGadgetsId(primary key) BlogRegionId(foreign key from tblBlogRegion) BlogId(foreign key from tblBlog) GadgetId(foreign key from tblGadget) Is it not normal database structure? Do you see anything that is cyclic? WHen i try to fetch list from tblGadgets i get this error :- [com.sun.istack.SAXException2: A cycle is detected in the object graph. This will cause infinitely deep XML: entity.BlogGadgets[blogGadgetsId=1] -> entity.Blogs[blogId=2] -> entity.BlogGadgets[blogGadgetsId=1]] I am trying to get list from web service using JAS-WS.

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  • how to connect java and mysql using mysql connector java 5.1.12

    - by user225269
    I'm still a beginner in java. I dont have any idea on how to import the files that I have downloaded into my java class. Its in this path: E:\Users\user\Downloads\mysql-connector-java-5.1.12 I don't know what to do with the files I extracted from the file that I have downloaded in the mysql site for me to connect my java application and mysql database. I'm using Netbeans 6.8. And have also installed wampserver. ive already check out This: http://stackoverflow.com/questions/2118369/java-trouble-connecting-to-mysql and this: http://stackoverflow.com/questions/1640910/connecting-to-a-mysql-database But they don't seem to have answers on how to make use of the mysql java connector file from mysql site. Please help, thanks.

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  • Memory efficient import many data files into panda DataFrame in Python

    - by richardh
    I import into a panda DataFrame a directory of |-delimited.dat files. The following code works, but I eventually run out of RAM with a MemoryError:. import pandas as pd import glob temp = [] dataDir = 'C:/users/richard/research/data/edgar/masterfiles' for dataFile in glob.glob(dataDir + '/master_*.dat'): print dataFile temp.append(pd.read_table(dataFile, delimiter='|', header=0)) masterAll = pd.concat(temp) Is there a more memory efficient approach? Or should I go whole hog to a database? (I will move to a database eventually, but I am baby stepping my move to pandas.) Thanks! FWIW, here is the head of an example .dat file: cik|cname|ftype|date|fileloc 1000032|BINCH JAMES G|4|2011-03-08|edgar/data/1000032/0001181431-11-016512.txt 1000045|NICHOLAS FINANCIAL INC|10-Q|2011-02-11|edgar/data/1000045/0001193125-11-031933.txt 1000045|NICHOLAS FINANCIAL INC|8-K|2011-01-11|edgar/data/1000045/0001193125-11-005531.txt 1000045|NICHOLAS FINANCIAL INC|8-K|2011-01-27|edgar/data/1000045/0001193125-11-015631.txt 1000045|NICHOLAS FINANCIAL INC|SC 13G/A|2011-02-14|edgar/data/1000045/0000929638-11-00151.txt

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  • MySQL "OR MATCH" hangs (long pause with no answer) on multiple tables

    - by Kerry
    After learning how to do MySQL Full-Text search, the recommended solution for multiple tables was OR MATCH and then do the other database call. You can see that in my query below. When I do this, it just gets stuck in a "busy" state, and I can't access the MySQL database. SELECT a.`product_id`, a.`name`, a.`slug`, a.`description`, b.`list_price`, b.`price`, c.`image`, c.`swatch`, e.`name` AS industry, MATCH( a.`name`, a.`sku`, a.`description` ) AGAINST ( '%s' IN BOOLEAN MODE ) AS relevance FROM `products` AS a LEFT JOIN `website_products` AS b ON (a.`product_id` = b.`product_id`) LEFT JOIN ( SELECT `product_id`, `image`, `swatch` FROM `product_images` WHERE `sequence` = 0) AS c ON (a.`product_id` = c.`product_id`) LEFT JOIN `brands` AS d ON (a.`brand_id` = d.`brand_id`) INNER JOIN `industries` AS e ON (a.`industry_id` = e.`industry_id`) WHERE b.`website_id` = %d AND b.`status` = %d AND b.`active` = %d AND MATCH( a.`name`, a.`sku`, a.`description` ) AGAINST ( '%s' IN BOOLEAN MODE ) OR MATCH ( d.`name` ) AGAINST ( '%s' IN BOOLEAN MODE ) GROUP BY a.`product_id` ORDER BY relevance DESC LIMIT 0, 9 Any help would be greatly appreciated.

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  • How to the view count of a question in momery?

    - by Freewind
    My website is like stackoverflow, there are many questions. I want to record how many times a question has been visited. I have a column called "view_count" in the question table to save it. When a user visited a question many times, the view_count should be increased only 1. So I have to record which user has visited which question, and I think it is too much expensive to save them in the database, because the records will be huge. So I want to keep them in the memory, and persistent the number to database every 10 minutes. I have searched about "cache" of rails, but I haven't found an example. I need an simple sample of how to do this, thanks for help~

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  • Using Unity and interfaces, how do I create a concrete class that implements IDisposable

    - by Ryan ONeill
    I have an interface (IDbAccess) for a database access class so that I can unit test it using Unity. It all works fine in Unity and now I want to make the concrete database class implement IDisposable so that it closes the db connections. My problem is that Unity does not understand that my concrete class is disposable because the interface (IDbAccess) cannot implement another interface. So how can I write code like this (pseudo code) so that Unity is aware that it needs to dispose the class as soon as I am done? Using var MyDbAccessInstance = Unity.Resolve<IDbAccess> { } Thanks Ryan

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