Laravel boolean value return wrong data - php

Question

I have table name payments in this table each row has column named paid which is boolean. When I try to get separate list of paid and unpaid rows based on this paid column it just return all rows regardless.
Code
Get unpaid rows
$purchases = Payment::wherePaid(false)
->where('employee_id', $user->id)
->orWhere('employer_id', $user->id)->with([
'employer',
'employee' => function($q) {
$q->select(['id', 'first_name', 'last_name']);
},
'template',
'training',
'contract',
])->get();
Get paid rows
$purchases = Payment::wherePaid(true)
->where('employee_id', $user->id)
->orWhere('employer_id', $user->id)->with([
'employer',
'employee' => function($q) {
$q->select(['id', 'first_name', 'last_name']);
},
'template',
'training',
'contract',
])->get();
Model
protected $casts = [
'paid' => 'boolean',
];
In both queries I am getting array of 4 which is include 3 unpaid and 1 paid row.
Update
Schema
public function up()
{
Schema::create('payments', function (Blueprint $table) {
$table->id();
$table->unsignedBigInteger('employer_id')->nullable();
$table->unsignedBigInteger('employee_id')->nullable();
$table->unsignedBigInteger('template_id')->nullable();
$table->unsignedBigInteger('contract_id')->nullable();
$table->unsignedBigInteger('training_id')->nullable();
$table->string('duration')->nullable();
$table->string('amount');
$table->boolean('paid')->default(false);
$table->string('booking_id')->nullable();
$table->string('invoice_no');
$table->timestamps();
});
Schema::table('payments', function (Blueprint $table) {
$table->foreign('employer_id')->references('id')->on('users')->onDelete('cascade');
$table->foreign('employee_id')->references('id')->on('users')->onDelete('cascade');
$table->foreign('template_id')->references('id')->on('contract_templates')->onDelete('cascade');
$table->foreign('contract_id')->references('id')->on('contracts')->onDelete('cascade');
$table->foreign('training_id')->references('id')->on('trainings')->onDelete('cascade');
});
}

Answer 1

I may be wrong, but I think your issue is that you are asking for paid = false AND employee_id = ID OR employer_id = ID. I think MySQL is thinking:
(paid = false AND employee_id = ID) OR (employer_id = ID)
So, try this query instead:
$purchases = Payment::wherePaid((false or true))
->where(function ($query) use ($user) {
return $query->where('employee_id', $user->id)
->orWhere('employer_id', $user->id)
})
->with([
'employer',
'employee' => function($query) {
return $query->select(['id', 'first_name', 'last_name']);
},
'template',
'training',
'contract',
])
->get();
That will change the query to:
(paid = false or true) AND (employee_id = ID OR employer_id = ID)