Model hasOne type

[abbadon1334]

when type is not defined for referenceOne and their_field don't have a type, it will get integer as default even if in atk4/field default type is string and atk4/schema SQL default type is string.

schema/src/Migration.php

Line 269 in 0a8e62c

'type' => $ref_type !== self::REF_TYPE_NONE && empty($persist_field->type) ? 'integer' : $persist_field->type,

I discovered it today, while i add download feature to atk4/filestore in this pr : atk4/filestore#14

The demos/basic.php of that pr is a perfect example of the problem.

if type is removed from the definition here : https://github.com/atk4/filestore/blob/ccb9aadef79c27d4ef1bd6011d1bf2e04ae01c86/src/Model/File.php#L19

the table will be created with field token as integer.

Discuss the problem even here : atk4/filestore#13

I know schema is dangerous to be changed, but this probably is just an alignment of functionality between atk4/data and atk4/schema.

[mvorisek]

feel free to submit a PR, referencing column should be supported to have any type, but implicit integer type should stay