Laravel 5-查询数据库中的多个关联表

Question

Description:

---

I'm working on a database setup that's requiring that I use multiple associative tables and I want to know how associative tables work within Laravel while taking advantage of the Eloquent Relationships.

I have a dataset containing soccer games. I need to store players, games, and specific player information for a game. So my structure should look something like:

 Player Table: +------------+---------+ | id | integer | +------------+---------+ | name | string | +------------+---------+ | team | string | +------------+---------+ | country | string | +------------+---------+ | average | string | +------------+---------+ | updated_at | Date | +------------+---------+ | created_at | Date | +------------+---------+ Game Table +--------------+---------+ | id | integer | +--------------+---------+ | name | string | +--------------+---------+ | country | string | +--------------+---------+ | tournament | string | +--------------+---------+ | score | string | +--------------+---------+ | started_at | Date | +--------------+---------+ | ended_at | Date | +--------------+---------+ | updated_at | Date | +--------------+---------+ | published_at | Date | +--------------+---------+ 

The issue being that I need a table that associates the two together as a player can have many games and a game has many players .

---

Question:

---

How would I go about structuring my code?

• Do I write a player_game model?
• Do I store associations in a different way than usual because this is Laravel?

Intuitively I would want to write a player_game migration that contains game specific information for a player. But how does that work with Laravel 5 and the hasMany() attributes?

Answer 1

Follow your intuition . You were right, what you are looking for is called a Many to Many Relationship .

Create the intermediate table and then you can play with different queries, if Laravel HasMany type methods doesn't fill your needs, you can always query the intermediate table directly.

Answer 2

you need to create a pivot table named game_player many to many relationship . you can store your game specific information inside this table.

relationship in Game Model,

public funtion players()
{ 
    return $this->hasMany('Player');
}

to access the game specific information from the pivot table,

foreach ($game->player as $player)
{
    echo $player->pivot->created_at;
}