CakePHP使用逗号分隔的ID加入

Question

Here I want to join two table with comma separated ids

For example my data is like:

[Restaurant] => Array
(
    [RST_ID] => 171
    [RST_NAME] => oneone
    [RST_IMAGE] => 
    [RST_CAT_ID] => 2,4,6
    [RST_CT_ID] => 27
    [RST_IS_TOP] => 3
    [RST_QR_CODE] => 
    [RST_CREATED_DATE] => 1394536725
    [RST_MODIFIED_DATE] => 1394536725
    [RST_STATUS] => 1
)

[Category] => Array
(
    [CAT_ID] => 2
    [CAT_NAME] => Vegetarian
    [CAT_CREATED_DATE] => 1375175962
    [CAT_MODIFIED_DATE] => 1375175962
    [CAT_STATUS] => 1
)

My Model Code:

 var $belongsTo = array(
        'Category' => array(
           'className' => 'Category',
           'foreignKey' => 'RST_CAT_ID',
           'conditions' => array('Category.CAT_ID IN ( Restaurant.RST_CAT_ID)')
        )
);

Real Query:

SELECT 
  `Restaurant`.`RST_ID`, `Restaurant`.`RST_NAME`, `Restaurant`.`RST_IMAGE`,
  `Restaurant`.`RST_CAT_ID`, `Restaurant`.`RST_CT_ID`, `Restaurant`.`RST_IS_TOP`,
  `Restaurant`.`RST_QR_CODE`, `Restaurant`.`RST_CREATED_DATE`,
  `Restaurant`.`RST_MODIFIED_DATE`, `Restaurant`.`RST_STATUS`, 
  `Category`.`CAT_ID`, `Category`.`CAT_NAME`, `Category`.`CAT_CREATED_DATE`,
  `Category`.`CAT_MODIFIED_DATE`, `Category`.`CAT_STATUS`, `City`.`CT_ID`,
  `City`.`CT_NAME`, `City`.`CT_CREATED_DATE`, `City`.`CT_MODIFIED_DATE`,
  `City`.`CT_STATUS` 
FROM `dailybit_dailybites`.`restaurant` AS `Restaurant`
LEFT JOIN `dailybit_dailybites`.`category` AS `Category` 
       ON (`Restaurant`.`RST_CAT_ID` = `Category`.`CAT_ID` 
           AND `Category`.`CAT_ID` IN ( `Restaurant`.`RST_CAT_ID`))
LEFT JOIN `dailybit_dailybites`.`city` AS `City` 
       ON (`Restaurant`.`RST_CT_ID` = `City`.`CT_ID`)  
WHERE 1 = 1

So what's the solution here?

It's giving me just one category data that for first id only.

Answer 1

First have a look at this question: MySQL search in comma list

As you can see the belongsTo query is just generating a join on the single id, CakePHP by default doesn't respect this special case. You will have to alter your query and pass all the ids manually, but your DB design is bad and it doesn't follow the CakePHP conventions at all.

• How do you prevent duplicates (which would waste space)
• How do you remove a given value (Requires custom function, leading to possibility of errors?
• How do you respond to performance issues as the size of my tables increase?

Instead of changing the query you should change this awkward DB design. You want to use HABTM here and a join table : Restaurant hasAndBelongsToMany Categoryy.

restaurants <-> restaurants_categories <-> categories

If you insist on using this bad DB design you'll have to use bindModel() and set the conditions manually:

'conditions' => array('FIND_IN_SET (Category.CAT_ID, ' . $listOfIds. ')')

I haven't tested this, try it yourself, see FIND_IN_SET() vs IN()

You'll have to have another method that gets you all the ids you want here before. Like I said, this is ineffectice and bad design.

Answer 2

You have to set your foreign Key false and find_in_set condition

 var $belongsTo = array(
        'Category' => array(
           'className' => 'Category',
           'foreignKey' => false,
           'conditions' => array('FIND_IN_SET(Category.CAT_ID,Restaurant.RST_CAT_ID)')
        )
); 

// you can pass an array at the place of 'Restaurant.RST_CAT_ID'