phalcon : volt get value from array which key taken from variable

Question

In phalcon templating engine volt (which is similar to twig) you can fetch all records by :

{% for product in products %}
    Name: {{ product.name }}
    Description: {{ product.description }}
    price: {{ product.price}}
{% endfor  %}

So, in my scenario, I'm building a crud template which will be used for different kind of models. What I wanted to achieve in this template is that every columns in this view are not hard-coded. So I store the columns I wanted to show into an array (defined in the controller, passed to the view) :

$cols = ['name','description','price']

In the view, to make it display all columns :

{% for product in products %}
   {% for col in cols %}
       {{ col }}: {{ product.col }}
   {% endfor  %}
{% endfor  %}

Obviously, this will result in error, because there is no "col" in product.

Is there any solution or alternative for this ?

Solution 1

While frustrated tinkering with volt extension, I found a simpler solution :

1. Convert the model object into array. In the controller : $products->toArray()

2. Simply, in the view, to display specific value of specific key from an array : {{ product[key] }}

Problem solved, though because it is now not in form of object, I can't access object property using dot like {{ product.some_field }}, instead {{ product['some_field'] }}.

Solution 2

You should use the readAttribute() function: http://forum.phalconphp.com/discussion/1231/volt-access-to-object-property-using-variable

{{ product.readAttribute(col) }}

Comments

[Haozhe Xie]

Not working at all. Error message: Fatal error: Call to undefined method stdClass::readAttribute().

[Yvan]

If the error says stdClass, that clearly means that you didn't give a model object, as in Phalcon all objects inherit from Phalcon\Mvc\Model constructor. And the initial question clearly implies it: fetch all records.

[Haozhe Xie]

I have inherit the model class from Phalcon\Mvc\Model. And I'm using Phalcon 2.0.

[Yvan]

I really doubt that: github.com/phalcon/cphalcon/blob/2.0.0/phalcon/mvc/… => the method exists, and you have «stdClass» in your error description, which means that you're dumping a default class, not a Phalcon object. Try a {{ dump(product) }} in volt, you'll see that's not a Phalcon object.

[Haozhe Xie]

Yes, you're right. Because I get the object using {% set i18nCategoryName = courseCategory['courseCategoryName'] | json_decode %}. And I want to get the attribute {language} (is a variable) of the i18nCategoryName. So this method doesn't work for me.

[Yvan]

You may use defined in this case, perhaps it would work as expected: {% if i18nCategoryName.property is defined %} ... {% endif %}