Unique two columns in laravel - php

Question

I'm working with laravel 5.6 I have this table
users_groups table
with these columns user_id reference to users auto increment id and group_id reference to group auto increment id in groups table
Now I'm trying to validate the entry of data to be unique value for both columns together, but it can't be user_id and group_id the same in the table.
I found this code and tried it:
$validatedData = $request->validate([
'user_id' => 'required|unique_with:users_groups,group_id',
'group_id' => 'required|unique_with:users_groups,user_id',
]);
It gave me this error:
Method Illuminate\Validation\Validator::validateUniqueWith does not exist.
Any help please?

Answer 1

I believe what you're looking for is this:
// Haven't tried this code, but it should be pretty close to what you're looking for
use Illuminate\Validation\Rule;
$validatedData = $request->validate([
'user_id' => [
'required',
Rule::unique('users_groups')->where(function ($query) {
return $query->where('group_id', $request->group_id);
})
],
'group_id' => [
'required',
Rule::unique('users_groups')->where(function ($query) {
return $query->where('user_id', $request->user_id);
})
]
]);

Answer 2

The correct way to validate against a table in a database is to use unique:table name,column
for your case it should be
$validatedData = $request->validate([
'user_id' => 'required|unique:users_groups,group_id',
'group_id' => 'required|unique:users_groups,user_id',
]);
see laravel docs

Answer 3

you can use this
'user_id' => [
'required',
Rule::unique('users_groups')->where(function ($query) {
return $query->where('group_id', \request()->input('group_id'));
})
],
'group_id' => [
'required',
Rule::unique('users_groups')->where(function ($query) {
return $query->where('user_id', \request()->input('user_id'));
})
],

Answer 4

All of the above answers are correct and code can still be simplified
'user_id' => [
'required',
Rule::unique('users_groups')->where('group_id', request('group_id'))
],
'group_id' => [
'required',
Rule::unique('users_groups')->where('user_id', request('user_id'))
],