Delete multi level in cakephp ( chain delete ) - php

Question

I want to delete all dependent rable record
My association
Branch Model
var $hasMany =array(
'Dealbranch' => array(
'className' => 'Dealbranch',
'foreignKey' => 'DLB_BR_ID',
'dependent' =>true
)
);
Dealbranch Model
var $belongsTo = array(
'Deal' => array(
'className' => 'Deal',
'foreignKey' => 'DL_ID',
'dependent' => true
),
'Branch' => array(
'className' => 'Branch',
'foreignKey' => 'DLB_BR_ID',
)
);
Deal Model
var $hasMany = array(
'Dealbranch' => array(
'className' => 'Dealbranch',
'foreignKey' => 'DLB_DL_ID',
)
);
In controller I have used
$this->Branch->delete($id,true);
Now here whem I am deleting branch , so dependent dealbranch deleted successfully but none of any deal record deleted
I want like : whem I am deleting branch , so all dependent dealbranch should be deleted and all dependent( depend on dealbranch) deal record should be deleted
here Deal is child of Dealbranch and Dealbranch is child of branch
Now, For one branch there are multiple record in Dealbranch, and for multiple Dealbranch there is one record in Deal
Please help me. I am using cakephp 2

Answer 1

All the model records that are associated with Branch can be deleted by using
$this->Branch->delete($id,true);
I think if you want to remove the deal records on deleting of branch records then your model Branch should be associated with Deal model.
Just try to add like this
Branch Model
var $hasMany =array(
'Dealbranch' => array(
'className' => 'Dealbranch',
'foreignKey' => 'DLB_BR_ID',
'dependent' =>true
),
'Deal' => array(
'className' => 'Deal',
'foreignKey' => 'your_foriegn_key',
'dependent' =>true
)
);
or you may try like this
Update:
According to your requirement here Deal is child of Dealbranch and Dealbranch is child of branch your model associations should be like this.
deal branch model should be like this.
DealBranch Model
var $belongsTo = array(
'Branch' => array(
'className' => 'Branch',
'foreignKey' => 'DLB_BR_ID',
)
);
var $hasMany = array(
'Deal' => array(
'className' => 'Deal',
'foreignKey' => 'DL_ID',
'dependent' => true
),
);
deal model should be like this.
Deal Model
var $belongsTo = array(
'Dealbranch' => array(
'className' => 'Dealbranch',
'foreignKey' => 'DLB_DL_ID',
)
);

Answer 2

While I know the people at cakephp do not use foreign keys in their databases and rely on the framework to take care of these details, in your case if the framework is giving you problems and you have control over the database update your foreign key constraints to CASCADE on DELETE DB operations.

Answer 3

The basic problem is in your data model. According to your model, any branch can be connected to zero or more deals and vice versa. Thus if you delete a branch, it does not make any sense to delete any deal, because the deal could be related to another branch. If the deal was deleted, the database integrity would be corrupted.
The setting you use is often used to model M:N relationship.1
The whole picture if your data model:
And what you really meant:
Branch model
var $hasMany =array(
'Deal' => array(
'className' => 'Deal',
'foreignKey' => <set_according_to_your_column_names>,
'dependent' =>true
)
);
Deal model
var $hasMany = array(
'Branch' => array(
'className' => 'Dealbranch',
'foreignKey' => <set_according_to_your_column_names>,
)
);
This way, you can in the controller call only:
$this->Branch->delete($id,true);
or even
$this->Branch->delete($id);
since the second parameter is true by default.
1 Example of M:N relationship is Person - Address. Anyone can use more than one address (e.g. home and work) and one address can be shared by more people (family, colleagues).