问题
Below is a posts model, and as you can see I have a belongsTo relationship on each post, so that the user details are also retrieved with the post. I would also like the exact same behaviour for the Posts.Children (see the hasMany definition below).
QUESTION:
How do I also apply the belongsTo relationship to the Posts.Children ( Posts.Child belongsTo User )??
<?php
class Post extends AppModel {
var $name = 'Post';
var $belongsTo = array(
'User' => array(
'className' => 'User',
'foreignKey' => 'post_owner',
'fields' => array( "User.id" , "User.first_name" , "User.last_name" )
)
);
// -=>
var $hasMany = array(
'Child' => array(
'className' => 'Post',
'foreignKey' => 'parent_id',
'conditions' => array( "Child.active" => "1" ),
'limit' => '2',
'order' => 'time DESC'
)
);
}
?>
And here is the PostsController Code which I am currently using:
class PostsController extends AppController {
var $helpers = array ('Html','Form');
var $name = 'Posts';
function index() {
$conditions = array( "Post.parent_id" => "0" , "Post.active" => "1" );
$this->set( 'posts', $this->Post->find('all',array( 'conditions'=>$conditions )) );
debug( $this->Post->find('all',array( 'conditions'=>$conditions )) );
}
"what's the output if you call debug($this->Post->Child); in the posts controller?" Here it is:
Post Object
(
[name] => Post
[hasMany] => Array
(
[Child] => Array
(
[className] => Post
[foreignKey] => parent_id
[conditions] => Array
(
[Child.active] => 1
)
[fields] =>
[order] =>
[limit] =>
[offset] =>
[dependent] =>
[exclusive] =>
[finderQuery] =>
[counterQuery] =>
)
)
[belongsTo] => Array
(
[User] => Array
(
[className] => User
[foreignKey] => dom
[fields] => Array
(
[0] => User.id
[1] => User.first_name
[2] => User.last_name
)
[conditions] =>
[order] =>
[counterCache] =>
)
)
[useDbConfig] => default
[useTable] => posts
[displayField] => title
[id] =>
[data] => Array
(
)
[table] => posts
[primaryKey] => id
[_schema] => Array
(
[active] => Array
(
[type] => integer
[null] =>
[default] => 1
[length] => 1
)
[id] => Array
(
[type] => integer
[null] =>
[default] =>
[length] => 11
[key] => primary
)
[parent_id] => Array
(
[type] => integer
[null] =>
[default] => 0
[length] => 11
)
[time] => Array
(
[type] => integer
[null] =>
[default] => 0
[length] => 11
)
[dom] => Array
(
[type] => integer
[null] =>
[default] =>
[length] => 11
)
[sub] => Array
(
[type] => integer
[null] =>
[default] =>
[length] => 11
)
[created] => Array
(
[type] => datetime
[null] =>
[default] =>
[length] =>
)
[modified] => Array
(
[type] => datetime
[null] =>
[default] =>
[length] =>
)
[text] => Array
(
[type] => string
[null] =>
[default] =>
[length] => 4096
[collate] => latin1_swedish_ci
[charset] => latin1
)
)
[validate] => Array
(
)
[validationErrors] => Array
(
)
[tablePrefix] =>
[alias] => Child
[tableToModel] => Array
(
[posts] => Child
[users] => User
)
[logTransactions] =>
[cacheQueries] =>
[hasOne] => Array
(
)
[hasAndBelongsToMany] => Array
(
)
[actsAs] =>
[Behaviors] => BehaviorCollection Object
(
[modelName] => Child
[_attached] => Array
(
)
[_disabled] => Array
(
)
[__methods] => Array
(
)
[__mappedMethods] => Array
(
)
)
[whitelist] => Array
(
)
[cacheSources] => 1
[findQueryType] =>
[recursive] => 1
[order] =>
[virtualFields] => Array
(
)
[__associationKeys] => Array
(
[belongsTo] => Array
(
[0] => className
[1] => foreignKey
[2] => conditions
[3] => fields
[4] => order
[5] => counterCache
)
[hasOne] => Array
(
[0] => className
[1] => foreignKey
[2] => conditions
[3] => fields
[4] => order
[5] => dependent
)
[hasMany] => Array
(
[0] => className
[1] => foreignKey
[2] => conditions
[3] => fields
[4] => order
[5] => limit
[6] => offset
[7] => dependent
[8] => exclusive
[9] => finderQuery
[10] => counterQuery
)
[hasAndBelongsToMany] => Array
(
[0] => className
[1] => joinTable
[2] => with
[3] => foreignKey
[4] => associationForeignKey
[5] => conditions
[6] => fields
[7] => order
[8] => limit
[9] => offset
[10] => unique
[11] => finderQuery
[12] => deleteQuery
[13] => insertQuery
)
)
[__associations] => Array
(
[0] => belongsTo
[1] => hasOne
[2] => hasMany
[3] => hasAndBelongsToMany
)
[__backAssociation] => Array
(
)
[__insertID] =>
[__numRows] =>
[__affectedRows] =>
[_findMethods] => Array
(
[all] => 1
[first] => 1
[count] => 1
[neighbors] => 1
[list] => 1
[threaded] => 1
)
[User] => User Object
(
[name] => User
[validate] => Array
(
[name] => Array
(
[rule] => Array
(
[0] => minLength
[1] => 4
)
[message] => Name has to be at least four characters
)
[email] => Array
(
[rule] => Array
(
[0] => email
)
[message] => Please enter a valid email
)
[username] => Array
(
[Username has to be at least four characters] => Array
(
[rule] => Array
(
[0] => minLength
[1] => 4
)
)
[This username is already taken, please try another] => Array
(
[rule] => isUnique
)
)
[password] => Array
(
[Password cannot be empty] => Array
(
[rule] => Array
(
[0] => notEmpty
)
)
[Password must be at least four characters] => Array
(
[rule] => Array
(
[0] => minLength
[1] => 4
)
)
[Passwords must match] => Array
(
[rule] => Array
(
[0] => passwordCompare
[1] => password_confirm
)
)
)
)
[useDbConfig] => default
[useTable] => users
[displayField] => id
[id] =>
[data] => Array
(
)
[table] => users
[primaryKey] => id
[_schema] => Array
(
[id] => Array
(
[type] => integer
[null] =>
[default] =>
[length] => 11
[key] => primary
)
[type] => Array
(
[type] => boolean
[null] =>
[default] => 1
[length] => 1
)
[is_active] => Array
(
[type] => boolean
[null] =>
[default] => 1
[length] => 1
)
[gender] => Array
(
[type] => boolean
[null] =>
[default] => 1
[length] => 1
)
[first_name] => Array
(
[type] => string
[null] =>
[default] =>
[length] => 200
[collate] => latin1_swedish_ci
[charset] => latin1
)
[last_name] => Array
(
[type] => string
[null] =>
[default] =>
[length] => 200
[collate] => latin1_swedish_ci
[charset] => latin1
)
[email] => Array
(
[type] => string
[null] =>
[default] =>
[length] => 200
[collate] => latin1_swedish_ci
[charset] => latin1
)
[username] => Array
(
[type] => string
[null] =>
[default] =>
[length] => 200
[collate] => latin1_swedish_ci
[charset] => latin1
)
[password] => Array
(
[type] => string
[null] =>
[default] =>
[length] => 200
[collate] => latin1_swedish_ci
[charset] => latin1
)
[created] => Array
(
[type] => datetime
[null] =>
[default] =>
[length] =>
)
[modified] => Array
(
[type] => datetime
[null] =>
[default] =>
[length] =>
)
[bio] => Array
(
[type] => string
[null] =>
[default] =>
[length] => 2048
[collate] => latin1_swedish_ci
[charset] => latin1
)
)
[validationErrors] => Array
(
)
[tablePrefix] =>
[alias] => User
[tableToModel] => Array
(
[users] => User
)
[logTransactions] =>
[cacheQueries] =>
[belongsTo] => Array
(
)
[hasOne] => Array
(
)
[hasMany] => Array
(
)
[hasAndBelongsToMany] => Array
(
)
[actsAs] =>
[Behaviors] => BehaviorCollection Object
(
[modelName] => User
[_attached] => Array
(
)
[_disabled] => Array
(
)
[__methods] => Array
(
)
[__mappedMethods] => Array
(
)
)
[whitelist] => Array
(
)
[cacheSources] => 1
[findQueryType] =>
[recursive] => 1
[order] =>
[virtualFields] => Array
(
)
[__associationKeys] => Array
(
[belongsTo] => Array
(
[0] => className
[1] => foreignKey
[2] => conditions
[3] => fields
[4] => order
[5] => counterCache
)
[hasOne] => Array
(
[0] => className
[1] => foreignKey
[2] => conditions
[3] => fields
[4] => order
[5] => dependent
)
[hasMany] => Array
(
[0] => className
[1] => foreignKey
[2] => conditions
[3] => fields
[4] => order
[5] => limit
[6] => offset
[7] => dependent
[8] => exclusive
[9] => finderQuery
[10] => counterQuery
)
[hasAndBelongsToMany] => Array
(
[0] => className
[1] => joinTable
[2] => with
[3] => foreignKey
[4] => associationForeignKey
[5] => conditions
[6] => fields
[7] => order
[8] => limit
[9] => offset
[10] => unique
[11] => finderQuery
[12] => deleteQuery
[13] => insertQuery
)
)
[__associations] => Array
(
[0] => belongsTo
[1] => hasOne
[2] => hasMany
[3] => hasAndBelongsToMany
)
[__backAssociation] => Array
(
)
[__insertID] =>
[__numRows] =>
[__affectedRows] =>
[_findMethods] => Array
(
[all] => 1
[first] => 1
[count] => 1
[neighbors] => 1
[list] => 1
[threaded] => 1
)
)
[Child] => Post Object
*RECURSION*
)
回答1:
You put it in the Children model.
var $belongsTo = array( 'Post' );
By the way, what you posted is the model, not the controller. Hopefully it's just a typo and you have that in the correct place.
It's also unclear if you call the model "Child" or "Children". The $hasMany relationship is uses Children, but in the question you say Posts.Child -- do you have the inflection set up correctly?
EDIT: I may have misunderstood the question: if you want a hasMany relationship, you already have that. The problem is either in the way you retrieve the data or in the relationship definition.
回答2:
you don't have to do anything, a Child is also a Post, so also belongsTo a User. (And you should name it "Child" not "Children")
With containable, try this: $this->Post->find('all',array('contain'=>array('Child'=>array('User'))));
来源：https://stackoverflow.com/questions/6983151/cakephp-relationship-question-posts-child-belongsto-user-how-to-define