relationship

Would someone kindly assist me with the following? I have two DataGridView objects that each display a DataTable, where the two datatables are related with the following code: DataSet dSet = new DataSet(); DataTable ParentList = ListToDataTable(_listOfAllAlbumObjects); DataTable ChildList = ListToDataTable(_listOfAllTrackObjects); dSet.Tables.AddRange(new DataTable[]{ParentList, ChildList}); DataColumn parentRelationColumn = ParentList.Columns["AlbumId"]; DataColumn childRelationColumn = ChildList.Columns["AlbumId"]; dSet.Relations.Add("ParentToChild", parentRelationColumn, childRelationColumn

To make relationship between users was created a table that looks like. sql CREATE TABLE `friends`( `from` INT NOT NULL, `to` INT NOT NULL, UNIQUE INDEX(`from`, `to`) ); As you may know - field from and to is a keys of user_id from users table. I'm using Kohana 3.09 with its default module Auth. Question is... *How to make ORM functionality around relations of users with (default) Model_User class?* Is there any needle to create additional class or perhaps i had some mistakes with relations one_to_many trouth and many_to_many trouth cause it did not work. Please help. My best regards. You

I have users which have products through a habtm link, which is working. I want to add a link between the user model and the product model, to keep track of the creator of that product (who doesn't always own the product, of course) But when I write in my user and product models a new link, the application screws up because I can't distinguish the creator of a product from the owner of (a lot of) products . Can you help me ? Here is my models : class Product < ActiveRecord::Base belongs_to :group has_and_belongs_to_many :authors has_and_belongs_to_many :users # THIS IS OK (with appart table)

I am unable to filter the contents of groups table with respect to username in users table using Eager Load Constraints public function username() { return $this->belongsTo('User','fk_users_id')->select(['id','username']); } I have tried using the code below but it filters only the users data not the groups data $groups = Groups::with(array('username' => function($query) use ($keyword) { $query->where('username', 'like', '%'.$keyword.'%'); })) ->where('status',1)->paginate($paginateValue); any help is welcome... Think it should be something like this: Groups::with('User')->whereHas('User',

I want to draw a oval in html5 canvas,and i found a good method for it in stackoverflow .but I have another quesition. function drawEllipse(ctx, x, y, w, h) { var kappa = 0.5522848; ox = (w / 2) * kappa, // control point offset horizontal oy = (h / 2) * kappa, // control point offset vertical xe = x + w, // x-end ye = y + h, // y-end xm = x + w / 2, // x-middle ym = y + h / 2; // y-middle ctx.beginPath(); ctx.moveTo(x, ym); ctx.bezierCurveTo(x, ym - oy, xm - ox, y, xm, y); ctx.bezierCurveTo(xm + ox, y, xe, ym - oy, xe, ym); ctx.bezierCurveTo(xe, ym + oy, xm + ox, ye, xm, ye); ctx.bezierCurveTo

How would I filter (construct an NSPredicate) for the following. Have a SCHOOL and PERSON entities One-to-many relationship, i.e. a PERSON has one SCHOOL, SCHOOL has many PERSONs Input to the filter method are (a) persons Name (e.g. all with a first name of "Tom") , and (b) the managed object of the School itself. for the purposes of this question assume School has no unique attributes So then my confusion/observations are: I already have the School managed object itself, however not sure how to use this when creating the predicate? But if I create the NSPredicate how do I create the