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• Linq2Sql How to write outer join query?

  - by Malcolm

  Hi, I have following SQL tables. ImportantMessages impID Message ImportantMessageUsers imuID imuUserID imuImpID I want to write a Linq2Sql query so that it returns any rows from ImportantMessages that does not have a record in ImportantMessagesUsers. Matchiing fields are impID ----- imuImpID Assume imuUserID of 6

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• How to configure reference to be deleted on parent table update?

  - by abatishchev

  I have two tables: info: ID, fee_id and fee: ID, amount and a reference between them (SQL Server 2008): ALTER TABLE info WITH CHECK ADD CONSTRAINT FK_info_fee FOREIGN KEY(fee_id) REFERENCES fee (ID) ALTER TABLE info CHECK CONSTRAINT FK_info_fee GO How to configure this reference that way so a record in fee will be deleted if info.fee_id becomes NULL

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• Castle ActiveRecord using Linq to Nhibernate Example

  - by Eric Neunaber

  I have been using the ActiveRecord library for many years. Recently I started a new project and I'm including the AR 2.0 release in this project. I saw that it shipped with the Linq to Nhibernate library. Are there any good examples of how to use Linq to Nhibernate with the Active Record library?

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• BindingList collection in wpf

  - by grid-wpf-architect

  Hi , I have BindingList collection, i want to add two event in the collection. one is BeforeChange and another one is afterChange, BeforeChange = Need to raise before we start editing the record. AfterChange = Need to raise after editing completed.

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• Rails: Why does find_by not work on my ActiveRecord model?

  - by randombits

  I have a simple model named Foo. Foo has two columns, bar and foobar. Doing a simple Foo.find_by_bar("a") is returning nil. There is a record in the table where bar contains a. Also, what's even more troubling, is I don't see the query even happening in the development log. A simple Foo.find(1) works though.

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• What's the best way to use NHibernate for objects without ID?

  - by Khash

  I have some classes in my app that don't require an ID to be persisted. These could be things like user logs or audit records. I can add an arbitaty id to them but I would like to avoid that as they don't mean anything. The retrieval of these objects is always on another key (like UserId) which is not unique to the record.

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• how can i find unused css in ajax app?

  - by Haroldo

  I've been searching and i can't find any ff addons or javascript for finding unused css in ajax apps. dust-me selectors can do a site-crawl, but i'm looking for something that examines loaded-in content... I'd like something where i can press 'record' and then make a load of clicks which will check off the used selectors, and hoping to find an existing one rather than try to write my own with jquery!

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• Is it possible to play an audio file or video file during use of camera

  - by Frank

  As the question says, is it possible to play an overlay video over the camera and record it. Also, would it be possible to play an audio file while in camera mode.

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• how to bind gridview through linq

  - by Manoj Wadhwani

  I am using linq to sql Currently i am binding gridviw through linq which query written in business logic call . i have extract record through query in business logic class and i want to bind that particular data to gridviw and return data . how to retrun data which type is array. code is mention below: CMSBusiness.DataClasses1DataContext db = new DataClasses1DataContext(); var cate = from p in db.categoryTables select new { categoryId=p.categoryId, categoryName=p.categoryName, categoryDesc=p.categoryDesc }; how to return value and bind gridview , Please suggest

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• Permissions done on MySQL side or PHP side?

  - by Kerry

  When I am grabbing data from my table that require permissions, should all the permission be done there? Such as checking for an admin or if they can view the data (in MySQL)? Or should I grab it if they have a record at all, then check the specific actions (such as view, add, edit, delete) on the PHP side?

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• SQL Server merge statement source and target issue

  - by George2

  Hello everyone, I am using SQL Server 2008 Enterprise and using the new Merge statement. From my experiment, I find source is always read only (table content not modified, i.e. no record is deleted/inserted/updated)? Is that correct understanding? thanks in advance, George

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• Grails Domain.get() returns null for mongo's ObjectId

  - by Shashank Agrawal

  I'm using grails 2.3.5 with mongodb 3.0.1 and no hibernate installed. I've a domain class which uses mongo's ObjectId. import org.bson.types.ObjectId class Category { ObjectId id String name } And has a record in mongo database: { "_id": ObjectId("53f6c34c33a429240e2ab471"), "name": "art", "version": NumberLong("41") } When I do, Category.get(new ObjectId("53f6c34c33a429240e2ab471")) somewhere in grails app, it returns null but when I do Category.get("53f6c34c33a429240e2ab471") it then actually returns the result. Why, get() method does not process ObjectId type?

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• Always-indexed MySQL indexing/searching replacements for InnoDB?

  - by Chad Johnson

  I am using InnoDB for a MySQL table, and obviously queries using LIKE and RLIKE/REGEXP can take a lot of time. I've tried Spinx, and it works great, except I have to re-index context at intervals. I can re-index every minute, but I am wondering if there is either 1) a setting in Sphinx to keep records always indexed or 2) other software besides Sphinx that will keep records always indexed. I want it where that immediately upon inserting or updating a record, the index is updated.

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• ACCESS.Visual basic. Make treeView object

  - by Fantomas

  I have a database(3 tables). I want to build treeView. I don't know how to create recordset and how to retrieve record from it.

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• can anyone give code for voice recorder as an application on android phone?

  - by gowtham

  i want to develop an application on android phone regarding voice recorder.i have to record a sound for about 30 seconds and then stop and save the recorded sound in gallery.can anyone post the code if you have please?

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• to find the last 7 days Records in sqlite?

  - by Praveen Chandrasekaran

  i would need to know the past 7 days record. i want to wrote a query for that in where condition. i have very basic knowledge in sqlite. Please help me for this query.

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• Can we write hashtable into file ?

  - by tiendv

  I have hashtable, my program want to record the valuse of hashtable to process later! But i have a quesiton . Can web write oject hastable in to file ? if can,how to load that file ?

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• SubSonic 3 LeftOuterJoin

  - by michaelpearce

  I have read in this forum that left outer join syntax is not supported by subsonic in an answer to a question on the topic by "Apocatastasis". I have the same issue in that when I create a query using the .LeftOuterJoin the resulting sql has an inner join rather than a left outer join. Can someone please confirm that LeftOuterJoin is indeed not supported and, if that is the case, why is it included in the active record syntax? Thanks Michael

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• Defining a different primary key in Mongomapper

  - by ming yeow

  I am defining a primary key in MongoMapper. class B key :_id, string key :externalId, string end The problem is that everything i add a new record in B, it appears that I need to explicity specify the _id, when it is already defined in the external id B.new(:_id=>"123", :external_id=>"123 ) That does not quite make sense. There should be a way to specify externalId as the primary key, no?

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• sql UPDATE, a calculation is used multiple times, can it just be calculated once?

  - by Zachery Delafosse

  UPDATE `play` SET `counter1` = `counter1` + LEAST(`maxchange`, FLOOR(`x` / `y`) ), `counter2` = `counter2` - LEAST(`maxchange`, FLOOR(`x` / `y`) ), `x` = MOD(`x`, `y`) WHERE `x` `y` AND `maxchange` 0 As you can see, " LEAST(`maxchange`, FLOOR(`x` / `y`) ) " is used multiple times, but it should always have the same value. Is there a way to optimize this, to only calculate once? I'm coding this in PHP, for the record.

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• Database concurrency issue in .NET application

  - by MC.

  If userA deleted OrderA while userB is modifying OrderA, then userB saves OrderA then there is no order in the database to be updated. My problem is there is no error! The SqlDataAdapter.Update succeeds and returns a "1" indicating a record was modified when this is not true. Does anybody know how this is supposed to work, thanks.

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• Django - 2 fields unique together

  - by webvulture

  Suppose, I want to record say poll choices by users everyday. In this case, i have a table named vote which has columns poll , choice and user-id . So how can i out the constraint (maybe in the django models or wherever possible) that poll and user-id both should not be the same for any entry but like the same user can vote for various different polls once and obviously various users can vote for the same poll. I hope I am clear.

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• datagrid speed issue

  - by girish

  i m binding gridview in asp.net application... i m about to bind some thousand records in datagrid... on RowDataBound event of the grid i need to check if the log in user is authorised to view the perticuler record...so i need to send database request...like wise such other two to three operation requires to send request to database.... about three to four request are sended to database during each row bound of the gridview...is it effective on speed of the grid?

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• In TableView How can i show "Showmore" option fordisplaying more option?

  - by Ankit

  I have used TableView and i am displaying Data coming from the Web.NOW I WANT TO PERFORMING the Paging TableView so after 5 record i want to show "showmore" Option and by pressing "showmore" It Display remaining data so how it is possible?

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• How do I make all the finders on the model ignorecase?

  - by Glex

  I have a model with several attributes, among them title and artist. The case of title and artist should be ignored in all the Active Record finders. Basically, if title or artist are present in the :conditions (or dynamically i.e. find_all_by_artist), then the WHERE artist = :artist should become WHERE UPPER(artist) = UPPER(:artist) or something along these lines. Is there a way of doing it with Rails?

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