Problem: I'm trying to query a PeopleType to find all the courses where a person isn't associated.
I have 4 tables
I have the following relationships
PERSON MODEL
public function getPeopleType() {
return $this->belongsTo('App\PeopleType','type_id');
}
public function getCourses() {
return $this->belpngsToMany('App\Course','People_Courses','person_id','course_id');
}
PEOPLE_TYPE MODEL
public function getPeople() {
return $this->hasMany('App\Person','type_id');
}
public function getCourses() {
return $this->belpngsToMany('App\Course','PeopleType_Courses','people_type_id','course_id');
}
My attempt:
$peopleType = \App\PeopleType::FindOrFail(1);
$courses = $peopleType->getCourses()->whereNotIn('id', function($q) use($person) {
$q->select('course_id')
->from('People_Courses')
->where('person_id', $person->id);
})->get();
My response:
Integrity constraint violation: 1052 Column 'id' in IN/ALL/ANY subquery is ambiguous
People Courses Table Schematic
Schema::create('People_Courses', function (Blueprint $table) {
$table->increments('id');
$table->integer('course_id');
$table->integer('person_id');
);
PeopleType_Courses Table Schematic
Schema::create('PeopleType_Courses', function (Blueprint $table) {
$table->increments('id');
$table->integer('course_id');
$table->integer('people_type_id');
);
When you're working on relations that have similar column name being selected in the query you need to resolve the ambiguity by specifying the table name with the column. eg:
$peopleType->getCourses()->whereNotIn('courses.id', function($q)... //courses.id
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