Laravel 4 Eloquent, "dynamic" relations? - laravel-4

Question

Basically the scenario is as follows. A section is a resource blueprint that can contain multiple fields, an Entry is a record of this blueprint.
class Entry extends Model
{
public function section()
{
return $this->hasOne('Section');
}
}
My problem so far:
So let's assume I have a Field model, where the field can have different types, and one value (its content).
Ideally the dynamic content property would be a one to one relation like
class Field extends Model
{
public function content()
{
return $this->hasOne('ContentModel');
}
}
However, the ContentModel class would be based on the type value of the field.
Each type represents a different typemodel, that knows how to write its value (for the sake of simplicity, let's assume there are 3 types, input, text, int, and corresponding 3 model classes ContentInput, ContentText, and ContentInt)
sections (Section)
- id (char, 36) // uuid
- label (varchar)
- handle (varchar)
entries (Section)
- id (char, 36) // uuid
- section_id (char, 36) // uuid of the section
fields (Field)
- id (integer)
- section_id (char, 36) // uuid of the section
- type (varchar) // the content model class
- handle (varchar)
- label (varchar)
content_input (ContentInput)
- id
- entry_id (char, 36) // entry record of a section
- field_id (integer)
- value (varchar)
content_text (ContentText)
- id
- entry_id (char, 36) // entry record of a section
- field_id (integer)
- value (text)
content_int (ContentInt)
- id
- entry_id (char, 36) // entry record of a section
- field_id (integer)
- value (integer)
// ... there're many more content types.
I was thinking of polymorphic relations, but they won't fit in this specific case.
Is there any efficient way to achieve this with eloquent?
[EDIT NOTES]:
I've updated the examples above as I was a bit unclear.
One possible solution would be to dynamically create the entry model class based on the section definition.
class Entry_249fcb61_4253_47d5_80ab_e012e19e7727 extends Entry
{
protected $with = ['gettext', 'getinput', 'getint'];
public function gettext()
{
return $this->hasMany('ContentText', 'entry_id');
}
// and so on
}
Still don't know if that's the way to go.

Answer 1

There is probably a better way but here is the solution I came up with for a similar problem I had
fields (Field)
- id
- inputId -> nullable -> default = null
- textId -> nullable -> default = null
- intId -> nullable -> default = null
Field.php
public function input()
{
return $this->hasOne('Content_input', 'id', 'inputId');
}
public function text()
{
return $this->hasOne('Content_text', 'id', 'textId');
}
public function integer()
{
return $this->hasOne('Content_int', 'id', 'intId');
}
you can load these relationships when you are retrieving Field and then you can check which content type each has by checking which of the 3 fields is not null