I have enabled flat catalog product option in the magento1 site( re-indexed after that), and called product collection from model its not returning all product details. It returns only
Array
(
    [entity_id] => 13
    [type_id] => simple
    [attribute_set_id] => 15
    [is_salable] => 1
    [stock_item] => Varien_Object Object
        (
            [_data:protected] => Array
                (
                    [is_in_stock] => 1
                )
            [_hasDataChanges:protected] => 
            [_origData:protected] => 
            [_idFieldName:protected] => 
            [_isDeleted:protected] => 
            [_oldFieldsMap:protected] => Array
                (
                )
            [_syncFieldsMap:protected] => Array
                (
                )
        )
) this much information. I want all product details. Somebody, please tell me why this is happening.