雄辩的Laravel-如何在laravel中加入3表？

Question

How can I get some data from 3 table using eloquent in laravel 5? I have 3 table, Team, Boards, User

Team Model:

public function member()
{
    return $this->belongsToMany(User::class)
                ->withPivot('status','user_role')
                ->withTimestamps();
}


public function boards()
{
    return $this->belongsToMany(Boards::class)->withTimestamps();;
}

Boards Model

public function member()
{
    return $this->belongsToMany(User::class)
                ->withPivot('status','user_role')
                ->withTimestamps();
}

public function team()
{
    return $this->belongsToMany(Team::class)
                ->withTimestamps();
}

Table structure :

Team

id
team_name

Team_User (Pivot table)

id
user_id
team_id

Boards

id
board_name

Boards_user (pivot Table)

id
boards_id
user_id

The boards are belongs to team, and i want to get the data of boards that belong to a team (ex : team A) that assign to a user (ex: user1) but also member of team A. How can i accomplish that?

Answer 1

According to your lastest comments:

• You don't need to relate User and Board directly. This can be accessed from the many-to-many relationship from User m----m Team .
• A Board belongs to a single Team, a Team can have many boards. This is a one-to-many relationship: Team m-----1 Board

So your tables should be structured this way:

users
=====
    - id    
    - ...

teams
=====
    - id
    - team_name

team_user
=========
    - id
    - team_id
    - user_id
    - status
    - user_role

boards
======
    - id
    - team_id
    - board_name

Then your relationships:

User.php

public function teams()
{
    return $this
       ->belongToMany(Team::class)
       ->withPivot('status','user_role');
}

Team.php

public function members()
{
    return $this
       ->belongToMany(User::class)
       ->withPivot('status','user_role');
}

public function boards()
{
    return $this->hasMany(Board::class);
}

Board.php

public function team()
{
    return $this->belongsTo(Team::class);
}

So now you can access the boards related to a User specific team doing this:

$user_boards = User
                 ::find(1) // getting a User
                 ->teams() // accessing the Teams relationship
                 ->where('team_name', '=', 'My Team Name') // Constraining
                 ->first() // accessing the Team record
                 ->boards // getting the boards.

---

Additionally to that, you could add a shortcut in the User model to access the boards:

User.php

...

public function boardsOfTeam($teamName)
{
    return $this
       ->teams()
       ->where('team_name', '=', $teamName)
       ->first()
       ->boards;
}

Then in your controller (or wherever you want):

$user_boards = User::find(1)->boardsOfTeam('My Team Name');

This is totally optional, of course.