嵌入式文档数组YiiMongoDbSuite

Question

I have three classes. The course consists of the stages. The stages consists of the steps.

class Course extends EMongoDocument{
....
    public function behaviors()
    {
        return array(
            'embeddedArrays' => array(
                'class'=>'ext.YiiMongoDbSuite.extra.EEmbeddedArraysBehavior',
                'arrayPropertyName'=>'stages',
                'arrayDocClassName'=>'Stage'
            ),
        );
    }
}

class Stage extends EMongoEmbeddedDocument{
...
    public function behaviors()
{
        return array(
            'embeddedArrays' => array(
                'class'=>'ext.YiiMongoDbSuite.extra.EEmbeddedArraysBehavior',
                'arrayPropertyName'=>'steps',
                'arrayDocClassName'=>'Step'
            ),
        );
}
class Step extends EMongoEmbeddedDocument{
...
}

In mongodb i have data:

{
    "name" : "course1",
    "online" : "0",
    "author_id" : ObjectId("521df3f1e405688411000029"),
    "approved" : false,
    "stages" : [ 
        {
            "_id" : ObjectId("521dfd84e40568d80900002a"),
            "name" : null,
            "steps" : null,
            "price" : null
        }, 
        {
            "_id" : ObjectId("5220c648e40568701c000031"),
            "name" : null,
            "steps" : [ 
                {
                    "_id" : ObjectId("5220c648e40568701c000032"),
                    "name" : null
                }
            ],
            "price" : null
        }
    ],
    "short_description" : "test",
    "_id" : ObjectId("521dfd7ce40568d809000029")
}

When i try read data from mongodb: Fatal error: Call to a member function toArray() on a non-object in * *extensions\\YiiMongoDbSuite\\extra\\EEmbeddedArraysBehavior.php on line 104

$arrayOfDocs[] = $doc->toArray();

If stage not have steps all works fine. What i do wrong?

Answer 1

There appear to be multiple versions of YiiMongoDbSuite on GitHub. Are you using v1.3.6.3 of canni/YiiMongoDbSuite ?

Looking at the beforeToArray() method in EEmbeddedArraysBehavior.php , the code seems to access the property and then immediately iterator over it. If the stages.0.steps field in your document is null , I don't see how the first is_array() check in the behavior code will pass. I would suggest debugging the function and inspecting the value of the stages property around where it is saved to the _cache property and before the foreach() iteration. My guess is that it may be an array with a single element whose value is null .

Answer 2

I found a solution. While filling values for embedded document fields it gets an array (what to fill) from function attributeNames() of that embedded document, then flip it and so on. So to fix NULL values you should fill in the return array of that function. My code will help you:

<?php
class Pricing extends EMongoEmbeddedDocument {
    public $setup;
    public $monthly;
    public $annually;
    public function rules() {
        return array(
        );
    }
    public function attributeNames() {
        return array(
            'setup' => 'setup',
            'monthly' => 'monthly',
            'annually' => 'annually'
        );
    }
}

also this code

public function setAttributes($values, $safeOnly=true)
    {
        if(!is_array($values))
            return;

        if($this->hasEmbeddedDocuments())
        {
            $attributes=array_flip($safeOnly ? $this->getSafeAttributeNames() : $this->attributeNames());

            foreach($this->embeddedDocuments() as $fieldName => $className)
                $this->$fieldName = new $className;
                if(isset($values[$fieldName]) && isset($attributes[$fieldName]))
                {
                    $this->$fieldName->setAttributes($values[$fieldName], $safeOnly);
                    unset($values[$fieldName]);
                }
        }

        parent::setAttributes($values, $safeOnly);
    }

helped me to prevent fatal error Fatal error: Call to a member function setAttributes() on a non-object in EMongoDocument.php