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  • How do I do this Database Model in Django?

    - by alex
    Django currently does not support the "Point" datatype in MySQL. That's why I created my own. class PointField(models.Field): def db_type(self): return 'Point' class Tag(models.Model): user = models.ForeignKey(User) utm = PointField() As you can see, this works, and syncdb creates the model fine. However, my current code calculates a length between two Points using raw SQL. cursor.execute("SELECT user_id FROM life_tag WHERE\ (GLength(LineStringFromWKB(LineString(asbinary(utm), asbinary(PointFromWKB(point(%s, %s)))))) < 55)... This says: Select where the length between the given point and the table point is less than 55. How can I do this with Django instead of RAW SQL? I don't want to do cursors and SELECT statements anymore. How can I modify the models.py in order to do this?

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  • How to design this class hierarchy?

    - by devoured elysium
    I have defined an Event class: Event and all the following classes inherit from Event: AEvent BEvent CEvent DEvent Now, with the info I gather from all these Event classes, I will make a chart. With AEvent and BEvent, I will generate points for that chart, while with CEvent and DEvent I will paint certain regions of the chart. Now, how should I signal this in my class hierarchy? Should I make AEvent and BEvent inherit from PointEvent while CEvent and DEvent inherit from RegionEvent, being that both RegionEvent and PointEvent inherit from Event? Should I add a field with an Enum to Event with 2 values, Point and Region, and each of the child classes set their value to it? Should I use some kind of pattern here? Which one? Thanks.

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  • Ampersand in GET, PHP

    - by NightMICU
    I have a simple form that generates a new photo gallery, sending the title and a description to MySQL and redirecting the user to a page where they can upload photos. Everything worked fine until the ampersand entered the equation. The information is sent from a jQuery modal dialog to a PHP page which then submits the entry to the database. After Ajax completes successfully, the user is sent to the upload page with a GET URL to tell the page what album it is uploading to -- $.ajax ({ type: "POST", url: "../../includes/forms/add_gallery.php", data: $("#addGallery form").serialize(), success: function() { $("#addGallery").dialog('close'); window.location.href = 'display_album.php?album=' + title; } }); If the title has an ampersand, the Title field on the upload page does not display properly. Is there a way to escape ampersand for GET? Thanks

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  • Add HTMl to CCK within Drupal

    - by Romelus96
    Hello im a newbie at using Drupal, and have come across a block in my progress. I have been using CCK to add new content types to my forms. I was wondering if there was any way to add to the form that is generated so that i may contain the elements and also insert visual html code like head rules etc. I have dabbled with the hook_form_alter() and it does not seem to help me in my efforts. Ive been through adjusting tpl.php files and such and have made no progress. Please if there is any one there in the inter-webs who is knowledgeable on this matter your advice would be greatly appreciated. Here is just an example of what I would want to do within the form: 1. Contain field elements within DIV's 2. Add HTML Content into the form

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  • Groovy 1.7 changes "final"?

    - by Aaron L. Carlow
    Just started learning Groovy, got the PragProg book "Programming Groovy" and had a problem compiling one of the sample scripts: class GCar2 { final miles = 0 def getMiles() { println "getMiles called" miles } def drive(dist) { if (dist > 0) { miles += dist } } } def car = new GCar2() println "Miles: $car.miles" println 'Driving' car.drive(10) println "Miles: $car.miles" try { print 'Can I see the miles? ' car.miles = 12 } catch (groovy.lang.ReadOnlyPropertyException ex) { println ex.message GroovyCar2.groovy: 20: cannnot access final field or property outside of constructor. @ line 20, column 35. def drive(dist) { if (dist > 0) miles += dist } ^ Groovy versions prior to 1.7 do not give an error. I looked through whatever documentation I could find and did not see the issue discussed. What is going on here? Aaron

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  • How to impelement messaging services in a website?

    - by Alex
    There's a website which currently has only web interfaces for all the users. However, new requirement has emerged which says that there is a need in providing an alternative interface for a certain group of website users who want to regularly receive pushed notifications(messages) that would inform them about new events(news) in their field of interest. What sort of interface would it be?Is it all about using a MOM(message-oriented middleware) like JMS and deploying it withing an application server on a website using publish/subscribe model?Is it the correct way how to meet these sort of requirements?And if it's not a web-based interface,would kind of interface would it be then for the users? Thanks

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  • ruby on rails params injection

    - by Julien P.
    Hello everyone, I have a question about ruby on rails and the process of assigning variables using the params variable passed through a form class User attr_accessible :available_to_admins, :name end Let's say that I have a field that is only available to my admins. Assuming that you are not an admin, I am going to not display the available_to_admins input in your form. After that, when I want to save your data I'll just do a: User.update_attributes(params[:user]) If you are an admin, then no problem, the params[:user] is going to contain name and available_tu_admins and if you're not then only your name. Since the available_to_admins is an attr_accessible parameter, how should I prevent non admin users from being able to inject a variable containing the available_to_admins input with their new value?

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  • Tables with no Primary Key

    - by Matt Hamilton
    I have several tables whose only unique data is a uniqueidentifier (a Guid) column. Because guids are non-sequential (and they're client-side generated so I can't use newsequentialid()), I have made a non-primary, non-clustered index on this ID field rather than giving the tables a clustered primary key. I'm wondering what the performance implications are for this approach. I've seen some people suggest that tables should have an auto-incrementing ("identity") int as a clustered primary key even if it doesn't have any meaning, as it means that the database engine itself can use that value to quickly look up a row instead of having to use a bookmark. My database is merge-replicated across a bunch of servers, so I've shied away from identity int columns as they're a bit hairy to get right in replication. What are your thoughts? Should tables have primary keys? Or is it ok to not have any clustered indexes if there are no sensible columns to index that way?

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  • Adding childs to list of parents with jquery /mvc2

    - by John Landheer
    Hi, I have a table of products on my page, each product has zero or more colors, the colors are shown as a list beneath the product. After the colors I have a button to add a color. The button will do an ajax call with the parent product id to a controller which will return a JSON object with color information. My problem is where to store the product id in the DOM, should I put it in a hidden field and use jquery in the click event of the "add color" to get to it? What is the best way to do this? TIA, John EDIT: The page is initially rendered on the server so I don't want to use jquery to add the id's to the page.

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  • Parse simple JSON with Jackson

    - by siik
    Here is my JSON: { "i": 53691, "s": "Something" } Here is my model: public class Test() { private int i; private String s; public setInt(int i){ this.i = i; } public setString(String s){ this.s = s; } // getters here } Here is my class for server's response: public class ServerResponse(){ private Test; public void setTest(Test test){ this.test = test;} public Test getTest(){ return Test; } } When I do: ObjectMapper mapper = new ObjectMapper(); mapper.readValue(json, serverResponse); I'm getting an exception like: JsonProcessingException: Unrecognized field "i" (Class MyClass), not marked as ignorable Please advice.

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  • Adhoc Data processing / ETL

    - by Dane
    I've just started at a new company in outsourced communications (e.g. print and mail, email, fax). One of the requirements is to process clients data and get it ready for mailing. For recurring jobs, this is easy using an ETL tool linked in with some addressing software, but for adhoc stuff it's a bit overkill. I've used inhouse developed stuff before (clunky but usable), but I don't want to have to re-develop that here. Any recommendations? Some features : Basic DBMS functionality (preferably with a proper DBMS backend for SQL support) Field concatenation (e.g. combine Firstname + Surname) "Pushing columns" (e.g. with address fields 1 - 8, push them left so if one is blank, the next one gets pushed up) Australia post mail sorting and dpid allocation (or can link into external tools relatively easily)

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  • Make NSFormatter validate NSTextFieldCell continuously

    - by harms
    In Cocoa, I have an NSOutlineView where the cells are NSTextFieldCell. The cell displays values which are strings that are formatted according to certain rules (such as floats or pairs of floats with a space in between). I have made a custom NSFormatter to validate the text, and this seems to work with no problem. However, the cell (or the outline view, I'm unsure what is causing this) only seems to use the formatter at the moment my editing would end. If I type some alphabetic characters into the text field (which violates the formatting rules), these characters show up -- the only way I notice the formatter doing its job is that I'm now prevented from moving keyboard focus away from this cell. If I return the contents of the cell to a valid form, then I can move focus away. I have set both the cell and the outline view to be "continuous". It would be better if I was unable to enter text into the cell in the first place. Is it possible to make it like that, and if so, how?

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  • JTable.setRowHeight prevents me from adding more rows

    - by Brent Parker
    I'm working on a pretty simple Java app in order to learn more about JTables, TableModels, and custom cell renderers. The table is a simple table with 8 columns only with text in them. When you click on an "add" button, a dialog pops up and lets you enter the data for the columns. Now to my problem. One of the columns (the last one) should allow for multiple lines of text. I'm already putting HTML into the field, but it is not wrapping. I did some research and looked into JTable#setRowHeight(). However, once I use setRowHeight, I can no longer add rows to the table. The data is put into the table model, but it does not show in the table. If I remove the setRowHeight line, then it adds data just fine. Is there another step to adding data to my data model that I'm missing? Thanks a lot!

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  • How to export SQL Server 2005 query to CSV

    - by jmgant
    I want to export some SQL Server 2005 data to CSV format (comma-separated with quotes). I can think of a lot of complicated ways to do it, but I want to do it the right way. I've looked at bcp, but I can't figure out how to put the quotes around the fields (except concatenating them to the field values, which is ugly). I guess I could do it with sqlcmd and -o, but that seems ugly for the same reason. Is there a bcp way to do it? Is there a reasonable sqlcmd way to do it? Is there some great, simple utility built into the Management Studio that I'm just overlooking?

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  • How to do google webpage translate in a Java class

    - by Robert
    Hi,this is a follow-up question of mine. Suppose now I have a URL : http://www.baidu.com/s?bs=%B0%C2%B0%CD%C2%ED&f=8&wd=%B0%C2%B0%CD%C2%ED and it work perfectly by inputting it in the text field of google translate and select from "Chinese" to English. My question is ,suppose now I want to achieve this in Java, I would like to adopt "Process q=Runtime.getRuntime().exec( "cmd /c start +URL" approach to do this. Could I achieve that by simply concatenating the Google translate URL and the webpage URL? If yes,could you please elaborte,thanks.

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  • mysql error in query for timestamp interval

    - by nik parsa
    I have voting_IP table as follow: +-----------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-----------+-------------+------+-----+---------+----------------+ | ip_id | int(11) | NO | PRI | NULL | auto_increment | | mes_id_fk | int(11) | YES | MUL | NULL | | | ip_add | varchar(40) | YES | | NULL | | | timestamp | datetime | YES | | NULL | | +-----------+-------------+------+-----+---------+----------------+ I want to run this query which has errors and I don't know how to correct it? $ip_sql=mysql_query("select ip_add from Voting_IP where mes_id_fk='$id' and ip_add='$ip' and timestamp > (DATE_ADD(now(), INTERVAL -1 HOUR);)"); I also tried this one: $ip_sql=mysql_query("select ip_add from Voting_IP where (mes_id_fk='$id' and ip_add='$ip' and timestamp > (DATE_ADD(now(), INTERVAL -1 HOUR);))");

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  • Serializing C# objects to DB

    - by Robert Koritnik
    I'm using a DB table with various different entities. This means that I can't have an arbitrary number of fields in it to save all kinds of different entities. I want instead save just the most important fields (dates, reference IDs - kind of foreign key to various other tables, most important text fields etc.) and an additional text field where I'd like to store more complete object data. the most obvious solution would be to use XML strings and store those. The second most obvious choice would be JSON, that usually shorter and probably also faster to serialize/deserialize... And is probably also faster. But is it really? My objects also wouldn't need to be strictly serializable, because JsonSerializer is usually able to serialize anything. Even anonymous objects, that may as well be used here. What would be the most optimal solution to solve this problem?

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  • Django as S3 proxy

    - by schneck
    Hi there, I extended a ModelAdmin with a custom field "Download file", which is a link to a URL in my Django project, like: http://www.myproject.com/downloads/1 There, I want to serve a file which is stored in a S3-bucket. The files in the bucket are not public readable, and the user may not have direct access to it. Now I want to avoid that the file has to be loaded in the server memory (these are multi-gb-files) avoid to have temp files on the server The ideal solution would be to let django act as a proxy that streams S3-chunks directly to the user. I use boto, but did not find a possibility to stream the chunks. Any ideas? Thanks.

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  • SharePoint 2007 Publishing site and Audience Targeting in Web Part

    - by Robert Vukovic
    In a Publishing site I have web part that has to show news items from the list that has Audience Targeting field. I am using CAML query to retrieve small number of last news items. Is it possible to specify Target Audience in the CAML query ? If not, how should I do it ? Retrieve all results and than apply filter in a loop ? I am practically duplicating Content Query Web Part and I need Audience Targeting in my custom web part.

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  • What skills are needed to be successful at robotics?

    - by Click Upvote
    I'm considering studying to be a robotics engineer. The desire to work in that field is definitely there.. but I'm wondering what my chances of success would be. Generally I'm good with mental tasks of any sort such as programming, maths, physics, etc, and I think i'd be able to do electrical work such as soldering wires, changing batteries, etc. However, I'm not so good with things of a physical nature where I have to use my hands. For example, if you give me some vegetables to slice and dice, all of them will be diced un-evenly and some will look ugly. This might be because I have poor mind-hand coordination or because of a lack of concentration. Thoughts?

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  • Converting a year from 4 digit to 2 digit and back again in C#

    - by Mike Wills
    My credit card processor requires I send a two-digit year from the credit card expiration date. Here is how I a currently processing: I put a DropDownList of the 4-digit year on the page. I validate the expiration date in a DateTime field to be sure that the expiration date being passed to the CC processor isn't expired. I send a two-digit year to the CC processor (as required). I do this via a substring of the value from the year DDL. Is there a method out there to convert a four-digit year to a two-digit year. I am not seeing anything on the DateTime object. Or should I just keep processing it as I am?

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  • Best way to store large dataset in SQL Server?

    - by gary
    I have a dataset which contains a string key field and up to 50 keywords associated with that information. Once the data has been inserted into the database there will be very few writes (INSERTS) but mostly queries for one or more keywords. I have read "Tagsystems: performance tests" which is MySQL based and it seems 2NF appears to be a good method for implementing this, however I was wondering if anyone had experience with doing this with SQL Server 2008 and very large datasets. I am likely to initially have 1 million key fields which could have up to 50 keywords each. Would a structure of keyfield, keyword1, keyword2, ... , keyword50 be the best solution or two tables keyid keyfield | 1 | | M keyid keyword Be a better idea if my queries are mostly going to be looking for results that have one or more keywords?

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  • Unable to delete oldest table partition - Oracle 11g

    - by poijoi
    Hi, I'm using the 11g interval partitioning feature in one of my tables. I set it up to create 1 day partitions on a timestamp field and created a job to delete data 3 months old. When I try to delete the oldest partition I get the following error: ORA-14758: Last partition in the range section cannot be dropped I would have thought that "Last" refers to the newest partition and not the oldest. How should I interpret this error? Is there something wrong with my partitions or should I in fact keep the oldest partition there at all time? Thanks in advance, PJ

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  • Conditional Validation using JQuery Validation Plugin

    - by Steve Kemp
    I have a simple html form that I've added validation to using the JQuery Validation plugin. I have it working for single fields that require a value. I now need to extend that so that if a user answers Yes to a question they must enter something in the Details field, otherwise the Details field can be left blank. I'm using radio buttons to display the Yes/No. Here's my complete html form - I'm not sure where to go from here: <script type="text/javascript" charset="utf-8"> $.metadata.setType("attr", "validate"); $(document).ready(function() { $("#editRecord").validate(); }); </script> <style type="text/css"> .block { display: block; } form.cmxform label.error { display: none; } </style> </head> <body> <div id="header"> <h1> Questions</h1> </div> <div id="content"> <h1> Questions Page 1 </h1> </div> <div id="content"> <h1> </h1> <form class="cmxform" method="post" action="editrecord.php" id="editRecord"> <input type="hidden" name="-action" value="edit"> <h1> Questions </h1> <table width="46%" class="record"> <tr> <td width="21%" valign="top" class="field_name_left"><p>Question 1</p></td> <td width="15%" valign="top" class="field_data"> <label for="Yes"> <input type="radio" name="Question1" value="Yes" validate = "required:true" /> Yes </label> <label for="No"> <input type="radio" name="Question1" value="No" /> No </label> <label for="Question1" class="error">You must answer this question to proceed</label> </td> <td width="64%" valign="top" class="field_data"><strong>Details:</strong> <textarea id = "Details1" class="where" name="Details1" cols="25" rows="2"></textarea></td> </tr> <tr> <td valign="top" class="field_name_left">Question 2</td> <td valign="top" class="field_data"> <label for="Yes"> <input type="radio" name="Question2" value="Yes" validate = "required:true" /> Yes </label> <label for="No"> <input type="radio" name="Question2" value="No" /> No </label> <label for="Question2" class="error">You must answer this question to proceed</label> </td> <td valign="top" class="field_data"><strong>Details:</strong> <textarea id = "Details2" class="where" name="Details2" cols="25" rows="2"></textarea> </td> </tr> <tr class="submit_btn"> <td colspan="3"> <input type="submit" name="-edit" value="Finish"> <input type="reset" name="reset" value="Reset"> </td> </tr> </table> </form> </div> </body> </html>

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  • Sqlite: CURRENT_TIMESTAMP is in GMT, not the timezone of the machine

    - by BrianH
    I have a sqlite (v3) table with this column definition: "timestamp" DATETIME DEFAULT CURRENT_TIMESTAMP The server that this database lives on is in the CST time zone. When I insert into my table without including the timestamp column, sqlite automatically populates that field with the current timestamp in GMT, not CST. Is there a way to modify my insert statement to force the stored timestamp to be in CST? On the other hand, it is probably better to store it in GMT (in case the database gets moved to a different timezone, for example), so is there a way I can modify my select SQL to convert the stored timestamp to CST when I extract it from the table? Thanks in advance!

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