many-to-many

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

来源： https://stackoverflow.com/questions/61500908/3-way-many-to-many-typeorm

来源： https://stackoverflow.com/questions/63472076/self-referencing-in-many-to-many-with-cascades

来源： https://stackoverflow.com/questions/29666140/prevent-m2m-changed-from-firing-when-creating-an-object

问题 In a Laravel 5.2 application I have three models: User , Role and Task . A User is associated with multiple Roles , and a Role is associated with multiple Tasks . Therefore each user is associated to multiple tasks, through their roles. I am trying to access all Tasks associated with a User , through their Roles. The relevant parts of my models look like: class User extends Authenticatable { public function roles() { return $this->belongsToMany('App\Role'); } public function tasks() { return

问题 In a Laravel 5.2 application I have three models: User , Role and Task . A User is associated with multiple Roles , and a Role is associated with multiple Tasks . Therefore each user is associated to multiple tasks, through their roles. I am trying to access all Tasks associated with a User , through their Roles. The relevant parts of my models look like: class User extends Authenticatable { public function roles() { return $this->belongsToMany('App\Role'); } public function tasks() { return

问题 I have two entities - Property and Owner. One Property can have a lot of Owners and Owner can have a lot of Properties. For join use property_owner table. How to update this many-to-many relation using NestJS/TypeORM? @Entity('property') export class Property extends EntityModel { @Column({ length: 255, nullable: false }) name: string; @ManyToMany(type => Owner, { cascade: true }) @JoinTable({ name: 'property_owner', joinColumn: { name: 'propertyId', referencedColumnName: 'id'},

问题 I have two entities - Property and Owner. One Property can have a lot of Owners and Owner can have a lot of Properties. For join use property_owner table. How to update this many-to-many relation using NestJS/TypeORM? @Entity('property') export class Property extends EntityModel { @Column({ length: 255, nullable: false }) name: string; @ManyToMany(type => Owner, { cascade: true }) @JoinTable({ name: 'property_owner', joinColumn: { name: 'propertyId', referencedColumnName: 'id'},

问题 The following is for a creative writing app. All aspects (characters, scenes, projects etc.) are recorded in the same model to allow for a simple sidebar directory. Each have extension models to add specific fields, so when an element is selected in the sidebar, the extension model is loaded as a form on the right. Extension model additional fields and universe model excluded for clarity. The problem is, I'm really stuck with restricting choices on a specific ManytoMany field. MODELS.PY class

问题 The following is for a creative writing app. All aspects (characters, scenes, projects etc.) are recorded in the same model to allow for a simple sidebar directory. Each have extension models to add specific fields, so when an element is selected in the sidebar, the extension model is loaded as a form on the right. Extension model additional fields and universe model excluded for clarity. The problem is, I'm really stuck with restricting choices on a specific ManytoMany field. MODELS.PY class