这是我第一个问题。我在cakephp 1.3中有一个可包含的行为问题。问题如下:我有一个具有以下关联的可交付模型:
class Deliverable extends AppModel {
var $name = 'Deliverable';
var $displayField = 'name';
var $actsAs = array('Containable');
var $belongsTo = array(
'Asset' => array(
'className' => 'Asset',
'foreignKey' => 'asset_id',
'dependent' => false
),
'DelRouteName' => array(
'className' => 'DelRouteName',
'foreignKey' => 'del_route_name_id',
),
'AccessGroup' => array(
'className' => 'AccessGroup',
'foreignKey' => false,
'conditions' =>
'Deliverable.role_id = AccessGroup.id'
)
);
var $hasOne = array(
'Artifact' => array(
'className' => 'Artifact',
'foreignKey' => 'deliverable_id',
'dependent' => true,
)
);
var $hasMany = array(
'Delivery' => array(
'className' => 'Delivery',
'foreignKey' => 'deliverable_id',
'dependent' => true,
'order' => 'Delivery.gmt_created',
)
);
下面是分页设置的配置:
$this->paginate['Deliverable'] = array_merge($this->paginate['Deliverable'], array(
'limit' => $this->getSysPref('items_per_page', 20),
'conditions' => array(
'Deliverable.role_id' => $this->myRoleSetIds(),
'Deliverable.asset_id' => $asset['Asset']['id'],
'Delivery.gmt_created >' => $keep_time
),
'order' => 'Deliverable.name',
'contain' => array(
'AccessGroup',
'Delivery' => array(
'conditions' => array(
'Delivery.gmt_created >' => $keep_time
),
'limit' => 1,
'order' => 'Delivery.gmt_created DESC'
),
'DelRouteName'
)
));
$deliverables = $this->paginate('Deliverable');
如您所见,可包含的行为被附加,关联被定义,并且关联的模型被包含(在分页配置部分中)。
我遇到的问题是,它能够成功地查询包含的模型"AccessGroup"answers"DelRouteName",但它不获取相关的"Delivery"数据。只有当我在针对子模型(Delivery)的父模型(Deliverable)上设置条件时,错误才会出现,我以前就这样做过,而且完全合法。我得到了这个SQL错误,正如您所看到的,表交付根本没有连接,但是access_groups和del_route_names是连接的。
下面是cake构建的SQL:
SELECT "Deliverable"."id" AS "Deliverable__id", "Deliverable"."name" AS
"Deliverable__name", "Deliverable"."artifact_name" AS "Deliverable__artifact_name",
"Deliverable"."type" AS "Deliverable__type", "Deliverable"."asset_id" AS
"Deliverable__asset_id", "Deliverable"."del_route_name_id" AS
"Deliverable__del_route_name_id", "Deliverable"."artifact_id" AS
"Deliverable__artifact_id", "Deliverable"."status" AS "Deliverable__status",
"Deliverable"."delivery_id" AS "Deliverable__delivery_id",
"Deliverable"."deliverable_id"
AS "Deliverable__deliverable_id", "Deliverable"."gmt_created" AS
"Deliverable__gmt_created", "Deliverable"."locked" AS "Deliverable__locked",
"Deliverable"."frozen" AS "Deliverable__frozen", "Deliverable"."cloaked" AS
"Deliverable__cloaked", "Deliverable"."role_id" AS "Deliverable__role_id",
"DelRouteName"."id" AS "DelRouteName__id", "DelRouteName"."name" AS
"DelRouteName__name",
"DelRouteName"."type" AS "DelRouteName__type", "AccessGroup"."id" AS "AccessGroup__id",
"AccessGroup"."name" AS "AccessGroup__name", "AccessGroup"."dn" AS "AccessGroup__dn",
"AccessGroup"."filters" AS "AccessGroup__filters", "AccessGroup"."paths" AS
"AccessGroup__paths" FROM "deliverables" AS "Deliverable" LEFT JOIN "del_route_names"
AS "DelRouteName" ON ("Deliverable"."del_route_name_id" = "DelRouteName"."id") LEFT
JOIN "access_groups" AS "AccessGroup" ON ("Deliverable"."role_id" = "AccessGroup"."id")
WHERE "Deliverable"."role_id" = ('0') AND "Deliverable"."asset_id" = '2' AND
"Delivery"."gmt_created" > '1361391936' ORDER BY "Deliverable"."name" ASC LIMIT 50
给了我这个错误(使用postgresql)
Warning (2): pg_query() [http://php.net/function.pg-query]: Query failed: ERROR: missing FROM-clause entry for table "Delivery"
我在这里不知所措,所以任何帮助都会非常感激。如果您需要更多的信息,请告诉我。
您不能从主模型中约束所包含的模型。CakePHP在执行contain()
时为每个模型使用单独的查询。如果需要添加跨模型的条件,则需要使用join。
在Dave的帮助下,更新后的代码现在可以工作了。
$this->paginate['Deliverable'] = array_merge($this->paginate['Deliverable'], array(
'limit' => $this->getSysPref('items_per_page', 20),
'conditions' => array(
'Deliverable.role_id' => $this->myRoleSetIds(),
'Deliverable.asset_id' => $asset['Asset']['id'],
'Delivery.gmt_created >' => $keep_time
),
'joins' => array(
array(
'table' => 'deliveries',
'alias' => 'Delivery',
'type' => 'LEFT',
'conditions' => array(
'Deliverable.id = Delivery.deliverable_id'
)
)
),
'order' => 'Deliverable.name',
'contain' => array(
'AccessGroup',
'Delivery' => array(
'conditions' => array(
'Delivery.gmt_created >' => $keep_time
),
'limit' => 1,
'order' => 'Delivery.gmt_created DESC'
),
'DelRouteName'
)
));