PHP / Laravel - One Model with multiple polymorphic relations - php

Question

In my web app, users will be able to save some parsed content to a table called field_results.
However, this model needs to reference two polymorphic relationships:
FieldResults.php:
// A field result morphs to either a document field or email field.
public function fieldable()
{
return $this->morphTo();
}
// A field result morphs to either a document or email.
public function typeable()
{
return $this->morphTo();
}
The fieldable refers to:
DocumentFields
EmailFields
and the typeable refers to:
Documents
Emails
In my DocumentField and EmailField models, I have defined this relationship:
// A field will have a final result.
public function result()
{
return $this->morphOne(FieldResult::class, 'fieldable');
}
And in my Document and Email models, I have defined this:
public function results()
{
return $this->morphMany(FieldRuleResult::class, 'typeable');
}
So consider below loop, where I need to save some content, that will reference a specific documentfield/emailfield and a specific document/email.
foreach ($document->fields as $field) {
$content = $field->content->text;
//Save the content to `FieldResult
$field->result()->create(['content' => $content]);
}
Above will only set the values for the fieldable morph:
SQLSTATE[HY000]: General error: 1364 : Field 'typeable_type' doesn't have a default value [...]
If I change it to save to the document instead, I get below error::
//Save the content to `FieldResult
$document->result()->create(['content' => $content]);
SQLSTATE[HY000]: General error: 1364 Field 'fieldable_type' doesn't have a default value [...]
How can I do, so my model FieldResult can have two polymorphic relationships?

Answer 1

You can solve this problem by replacing this line:
$field->result()->create(['content' => $content]);
By the following lines:
$field->result()->create([
'content' => $content,
'typeable_id' => $document->id,
'typeable_type' => get_class($document),
]);