many-to-many

I'm working with ASP.NET MVC 4 and Entity Framework. In my database, I have a table Subscription which represents a subscription to public transports. This subscription can provide access to several public transport companies (so a subscription could have 1, 2, 3, ... companies) then it is a Many-to-Many relation between these tables (I have an intermediate table between them). I want to allow the creation of a subscription throught a page which will contain a field Amount of the subscription and the available companies by checkboxes. Every checkbox represents an existing company (a company

I have a phone_models, phone_problems, and a phone_model_phone_problem pivot table. The pivot table has an extra column 'price'. PhoneModel: class PhoneModel extends \Eloquent { public function problems() { return $this->belongsToMany('RL\Phones\Entities\PhoneProblem')->withPivot('price'); } } PhoneProblem: class PhoneProblem extends \Eloquent { public function models() { return $this->belongsToMany('PhoneModel')->withPivot('price'); } } What I'm trying to do is get the price of a specific phone with a specific problem. This is how I have it now but I feel like Laravel has a built in Eloquent

So, I am using the Linq entity framework. I have 2 entities: Content and Tag . They are in a many-to-many relationship with one another. Content can have many Tags and Tag can have many Contents . So I am trying to write a query to select all contents where any tags names are equal to blah The entities both have a collection of the other entity as a property(but no IDs). This is where I am struggling. I do have a custom expression for Contains (so, whoever may help me, you can assume that I can do a "contains" for a collection). I got this expression from: http://forums.microsoft.com/MSDN

I am trying to query for Objects that match ALL of a given set of Tags. Basically I want users to be able to add on more and more Tags to filter or "narrow down" their search results, kind of like newegg.com does. My table structure is a table of Objects, a table of Tags, and a MANY:MANY relation table ObjectsTags. So I have a JOIN query like so: SELECT * FROM Objects LEFT OUTER JOIN ObjectsTags ON (Objects.id=ObjectsTags.object_id) LEFT OUTER JOIN Tags ON (Tags.id=ObjectsTags.tag_id) I tried using an IN clause/condition, like this: SELECT * FROM Objects LEFT OUTER JOIN ObjectsTags ON (Objects

I have a problem with many to many relationship in EF core. I have the following model classes: public class Meal { public int Id { get; set; } [Required] public int Insulin { get; set; } public MealType Type { get; set; } public ICollection<MealFood> MealFoods { get; set; } public Meal() { MealFoods = new Collection<MealFood>(); } } public class Food { public int Id { get; set; } [StringLength(255)] public string Name { get; set; } [Required] public int Carbohydrates { get; set; } public ICollection<MealFood> MealFoods { get; set; } public Food() { MealFoods = new Collection<MealFood>(); } }