Where Has Morph Conditions Directive

Where Has Morph Conditions Directive

Would it be possible to create whereHasMorphConditions directive? Such directive would behave as whereHasConditions directive but on morph columns. Laravel has added function on query builder whereHasMorph in version 5.8. Only difference i can now see form classic whereHas is that whereHasMorph takes additional second parameter determining which polymorphic types should be queried with addition of current type in callback function.

Proposed example:

union Userable = EmployeeUser | ParentUser

type EmployeeUser {
    accountNumber: String!
    user: User! @morphOne
}

type ParentUser {
    phone: String!
    user: User! @morphOne
}

type User {
    name: String!
    userable: Userable! @morphTo
}

type Query {
    users(
        userable: _ @whereHasMorphConditions(
        validMorphs: [
           {"EMPLOYEE_USER": "App\\EmployeeUser"}, 
           {"PARENT_USER": "App\\ParentUser"}, 
        ]
        columns: {   
           "accountNumber": ["EMPLOYEE_USER"], 
           "phone": ["PARENT_USER"]
        })
    ): [User]! @all
}

ValidMorphs could restrict and define possible morphed models.
Columns would define column name with array of possible morphed models.

One could then call something like:

query Users {
    users(
        userable: {column: {name: PHONE, model: PARENT_USER}, operator: LIKE, value: "xxx"}
    ) {
    ...
   }
}

PS - this is my first ever proposal of anything in IT world. Love your work.

Start by locating the existing whereHasConditions directive and compare its behavior with Laravel's whereHasMorph query-builder API. Define how validMorphs, columns, and the current morph type should work in the proposed GraphQL arguments; done means the new directive supports the demonstrated polymorphic filtering behavior.