在cakephp 2.x中如何使用連接表獲取第三個表數據？

'books 
    id,name 
categories 
    id,name 
books_categories 
    id,book_id,category_id'

'App :: uses（'AppModel'，'Model'）; 類圖書擴展AppModel {在cakephp 2.x中如何使用連接表獲取第三個表數據？

public $useTable = 'books'; 
    public $belongsTo = array(

     'Agerange' => array(
      'className' => 'Agerange', 
      'foreignKey' => 'agerange_id' 
     ), 
     'Publication' => array(
      'className' => 'Publication', 
      'foreignKey' => 'publication_id' 
     ), 
    ); 

    public $hasMany = array(
     'Category' => array(
      'className' => 'Book_Category', 
      'foreignKey' => 'book_id', 
      'joinTable' => 'books_categories', 
      'fields' => array('Category_id',),   
     ) 
    ); 
} 

<?php 
App::uses('AppModel', 'Model'); 
class Book_Category extends AppModel { 
    public $useTable = 'books_categories'; 

    public $belongsTo = array(
     'Book' => array(
      'className' => 'Book', 
      'foreignKey' => 'book_id' 
     ), 
     'Category' => array(
      'className' => 'Category', 
      'foreignKey' => 'category_id' 
     ) 
    ); 


} 

in BooksController ...... 

$this->paginate = array(
      'contains'=>array('Book','Publication','Agerange','Book_Category'),    
      'order' => 'Book.id ASC'); 

      $books = $this->paginate('Book'); 

    enter code here 


{ 
Book: {id: "111", title: "ABC", subtitle: "English Today Primer", author: "Pruthviraj",…},…} 
Agerange:{id: "31", from: "0", to: "2", status: true} 
Book:{id: "111", title: "ABC", subtitle: "English Today Primer", author: "Pruthviraj",…} 
Category:[{Category_id: "5", book_id: "111"}] 
}'

輸出現在我只得到CATEGORY_ID：5這沒關係，但我想的名字字段也範疇，所以我怎樣才能用書和Book_Category類別的名稱字段？

來源

2016-11-07 Pruthvi Rathod

嘗試增加$這個 - >型號 - >遞歸= 2表上執行查詢之前。它會根據您在模型上設置的屬於或所有條件自動獲取相應的數據 –

加入Categoy到Book_Category

$this->paginate = array(
    'contains' => array(
     'Book', 
     'Publication', 
     'Agerange', 
     'Book_Category' => 'Category' 
    ), 
    'order' => 'Book.id ASC' 
);

或使用hasAndBelongsToMany關聯修改您的包含陣列，它的簡單得多

開始通過刪除Book_Category

然後換書模式

class Book extends AppModel { 

public $useTable = 'books'; 

public $belongsTo = array(
    'Agerange' => array(
     'className' => 'Agerange', 
     'foreignKey' => 'agerange_id' 
    ), 
    'Publication' => array(
     'className' => 'Publication', 
     'foreignKey' => 'publication_id' 
    ), 
); 

public $hasAndBelongsToMany = array(
    'Category' => array(
     'className' => 'Category', 
     'joinTable' => 'books_categories', 
     'foreignKey' => 'book_id', 
     'associationForeignKey' => 'category_id' 
    ) 
);

}

然後，在你的控制器來更改設置分頁這樣

@link Cakephp HABTM association

來源

2016-11-07 12:59:12

在cakephp 2.x中如何使用連接表獲取第三個表數據？

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