How to define CRUD field for a column with array datatype on model update

[awmaMe]

I have a column named 'value', which is text datatype in MySQL, it is then casted to JSON in its model class.
The structure is always the same, defined as below:
[ 'image_path' => (string) 'path/to/image', 'url' => (string) 'some/url' ]

I have tried the following but values are not displayed in the edit page:

CRUD::addField([
'name' => 'value.image_path',
'label' => 'Icon',
'type' => 'upload',
'upload' => true,
]);
CRUD::addField([
'name' => 'value.url',
'label' => 'URL',
'type' => 'text',
]);

I have the same fields as columns in list operation as below, which displays the correct data:

CRUD::addColumn([
'name' => 'value.image_path',
'label' => 'Icon',
'type' => 'image',
]);
CRUD::addColumn([`
'name' => 'value.url',
'label' => 'URL',
'type' => 'text',
]);

[awmaMe]

I don't understand why on getting edit page, the mutator function in the model is run.
And on submitting form, mutator is not run anymore. I must be doing something wrong.

[awmaMe]

The reason why mutator ran was because i overloaded the edit() function in my controller, still don't understand why it ran though.

[awmaMe]

I have changed table structure to avoid this problem.