many-to-many

问题 I'm developing a mobile application backend with Django 1.9.1 I implemented the follower model and now I want to list all of the followers of a user but I'm currently stuck to do that. I also use Django Rest Framework. This is my UserProfile model class UserProfile(models.Model): # Linking UserProfile to User model. user = models.OneToOneField(User) city = models.CharField(null=True, max_length=30, blank=True) gender = models.CharField(null=True, max_length=10, blank=True) # m for male, f for

问题 I have imported some data to a temp SQL table from an Excel file. Then I have tried to insert all rows to two related tables. Simply like this: There are Events and Actors tables with many to many relationship in my database. Actors are already added. I want to add all events to Events table and then add relation(ActorId) for each event to EventActors tables. (dbo.TempTable has Title, ActorId columns) insert into dbo.Event (Title) Select Title From dbo.TempTable insert into dbo.EventActor

问题 Version: Laravel 5.4 I have 3 Models Model: Employee protected $fillable = ['name']; public function emails(){ return $this->belongsToMany('App\Email')->using('App\EmailEmployee'); } Model: Email protected $fillable = ['username']; public function employees(){ return $this->belongsToMany('App\Employee')->using('App\EmailEmployee'); } Every Employee has many email access and emails allocates to many employees. But I have another column in email_employee table email_id (emails table) employee

问题 Version: Laravel 5.4 I have 3 Models Model: Employee protected $fillable = ['name']; public function emails(){ return $this->belongsToMany('App\Email')->using('App\EmailEmployee'); } Model: Email protected $fillable = ['username']; public function employees(){ return $this->belongsToMany('App\Employee')->using('App\EmailEmployee'); } Every Employee has many email access and emails allocates to many employees. But I have another column in email_employee table email_id (emails table) employee

问题 I have a simple task list app that has users and lists on it, the users are managed by Devise, and can create task lists, as well as favorite lists created by other users, or by themself. The relation of ownership between users and lists were easy to establish, but I am having trouble setting up the relation of a user favoriting a list. I envision it being a many-to-many relation after all, a user can favorite many lists and a list can be favorited by many users, this relationship happening

来源： https://stackoverflow.com/questions/64799497/how-to-declare-column-description-using-ef-6-for-many-many-relationship

来源： https://stackoverflow.com/questions/64630943/dql-queries-not-returning-what-i-would-like

来源： https://stackoverflow.com/questions/64630943/dql-queries-not-returning-what-i-would-like

来源： https://stackoverflow.com/questions/64630943/dql-queries-not-returning-what-i-would-like

来源： https://stackoverflow.com/questions/63732318/django-differentiating-between-user-and-template-condtion