relationship

i have relationship many to many table 'admins' , 'pjt_roles' with pjt_role_admin. but,not working i have 2 model class Role protected $table = 'pjt_roles'; public function Admin(){ return $this->belongsToMany(Admin::class',pjt_role_admin'); } class Admin public function Role(){ return $this->belongsToMany(Role::class,'pjt_role_admin'); } and table pjt_role_admin have attribute admin_id from table admins role_id from table pjt_roles Specify your pivot table in relationship. Default laravel assume admin_role as your pivot table because you have Admin and Role models class Role protected $table

I am remodeling a book recommendation personal site. I want to filter books by more than one criterion. For example, I want to display all books which are BOTH philosophy and science-fiction. Peter Watt's Blindsight being an example of this. Now I can do only a single criterion filter: I have a pivot table for Model Books public function genres() { return $this->belongsToMany('App\Genre', 'bookgenres', 'book_id', 'genre_id'); } Model Genre: public function books() { return $this->belongsToMany('App\Book', 'bookgenres', 'genre_id', 'book_id'); } The pivot table bookgenres sample: id , book_id ,

I'am using graph database (Neo4j) , and I need to make relations between relations , for example : (user1)-[:FOLLOWED]->(user2) I want to allow other users to like this activity (that user1 followed user2) , what's the best implementation for this ? Short answer: You can't create a relation to a relation. How to do? You have to create an activity node in the middle of your relation: (user1)-[:FOLLOWED]->(activity{date:..., blabla:...})-[:ACTIVITY_FOR]->(user2) Then you'll be able to make another user LIKE this activity by creating a relation from user to activity node. Relation names are

I'm working on a new app in Rails 3 but I'm not sure how can I build the relations between the models. Basically I have a model User and a model Project . An user can create a Project, becoming the project owner. But any other user besides the project owner can join this project as well, but as team member. Would I need to create a new model for this team relationship? And how would be the relations among this all? Thanks in advance. I'm doing something similar with a photo gallery that has shared permissions. Here is roughly the structure I've given it (though this is adapted from another

I used nuget to upgrade EF5 to EF6, and somewhere a breaking change was introduced for my solution. I discovered this when running one of my unit tests (it affects everything though). In each test, I init by doing this: // warm up EF. using (var context = new ReportingDbContext()) { context.Database.Initialize(false); // <-- boom! } // init the service _inventoryService = new InventoryService(); It tosses me this exception: The property 'EmployeeID' cannot be configured as a navigation property. The property must be a valid entity type and the property should have a non-abstract getter and