質問編集履歴
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@@ -136,4 +136,6 @@
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> Property [books] does not exist on the Eloquent builder instance.
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139
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-
しかし、なぜか`first()`とすることで取得できた。
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しかし、なぜか`first()`とすることで取得できた。
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取得結果
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4
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];
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public function books(){
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return $this->belongsToMany("App\Book");
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103
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return $this->belongsToMany("App\Book")->withTimestamps();
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}
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}
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@@ -127,4 +127,13 @@
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return $this->belongsToMany("App\User");
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}
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}
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```
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```
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### 追記
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`DB::table~latest();`だと単一のプロパティではないのか以下の様なエラーとなる。
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> Property [books] does not exist on the Eloquent builder instance.
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+
しかし、なぜか`first()`とすることで取得できた。
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3
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@@ -4,7 +4,12 @@
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4
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リレーション定義に関しては[以前の質問](https://teratail.com/questions/291543)で解決することができたのですが、借りた履歴を引っ張ってきたのですが、借りた時間を取得したいにも関わらず、その本が投稿(追加された)時間の`created_at`が表示されてしまいます。
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phpMyAdminで確認したところ、借りた時間はレコードに挿入されていました。
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### 抽出したいカラムに関して
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借りた時間というのは実際には借りた際にpostでレコードが挿入されますので、
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create_bookテーブル(create_book_user_table.php)にある`timestamps`で`created_at`を表しています。
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### 該当のソースコード
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```PHP
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2
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$table->timestamps();
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```
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create_book_user_table.php
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```PHP
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$table->id();
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$table->string('name');
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$table->string('email')->unique();
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$table->timestamp('email_verified_at')->nullable();
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$table->
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$table->unsignedBigInteger('user_id');
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$table->
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$table->unsignedBigInteger('book_id');
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$table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
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$table->foreign('book_id')->references('id')->on('books')->onDelete('cascade');
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$table->timestamps();
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```
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@@ -119,7 +118,7 @@
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'book_name', 'book_price', 'book_detail',
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];
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public
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public function users(){
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return $this->belongsToMany("App\User");
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}
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}
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1
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@@ -21,4 +21,106 @@
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Laravel 7.28.1
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PHP 7.X
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MySQL
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MySQL
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create_users_table.php
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```PHP
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$table->id();
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$table->string('name');
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$table->string('email')->unique();
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$table->timestamp('email_verified_at')->nullable();
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$table->string('password');
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$table->rememberToken();
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$table->timestamps();
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```
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create_user_table.php
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```PHP
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$table->id();
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$table->string('name');
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$table->string('email')->unique();
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$table->timestamp('email_verified_at')->nullable();
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$table->string('password');
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$table->rememberToken();
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$table->timestamps();
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```
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create_book_table.php
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```
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$table->id();
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$table->char('book_name');
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$table->bigInteger('book_price');
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$table->text('book_detail');
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$table->timestamps();
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```
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App\User.php
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```PHP
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59
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<?php
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+
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namespace App;
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use Illuminate\Contracts\Auth\MustVerifyEmail;
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use Illuminate\Foundation\Auth\User as Authenticatable;
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use Illuminate\Notifications\Notifiable;
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class User extends Authenticatable
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{
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use Notifiable;
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/**
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* The attributes that are mass assignable.
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*
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* @var array
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*/
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protected $fillable = [
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'name', 'email', 'password',
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];
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/**
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* The attributes that should be hidden for arrays.
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*
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* @var array
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*/
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85
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protected $hidden = [
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'password', 'remember_token',
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];
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+
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/**
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90
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* The attributes that should be cast to native types.
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*
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* @var array
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*/
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+
protected $casts = [
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+
'email_verified_at' => 'datetime',
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+
];
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97
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+
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98
|
+
public function books(){
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|
99
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+
return $this->belongsToMany("App\Book");
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|
+
}
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101
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+
|
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102
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+
}
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103
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+
```
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105
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App\Book.php
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106
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+
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107
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+
```PHP
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108
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<?php
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109
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+
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110
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+
namespace App;
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111
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+
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112
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+
use Illuminate\Database\Eloquent\Model;
|
|
113
|
+
|
|
114
|
+
class Book extends Model
|
|
115
|
+
{
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116
|
+
protected $table = "books";
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117
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+
|
|
118
|
+
protected $fillable = [
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|
119
|
+
'book_name', 'book_price', 'book_detail',
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120
|
+
];
|
|
121
|
+
|
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122
|
+
public funciton users(){
|
|
123
|
+
return $this->belongsToMany("App\User");
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|
124
|
+
}
|
|
125
|
+
}
|
|
126
|
+
```
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