In my Laravel application, in theusers
table I have an additional column namedplatform
.
When new users sign up, they pick one of three platforms: site1, site2, site3. Now, I want to validate that the entered email is unique, but only for the selected platform.
For example, let's say a user exists withemail = [email protected]
andplatform = site1
.
Then, if you go to the register form and input...
email = [email protected]
platform = site2
...you should be able to sign up.
But if you enter...
email = [email protected]
platform = site1
...you should see an error message because the user[email protected]
already exists for the platformsite1
.
In my validator, I've been unable to set this up. If I do this then it returns an error even when platforms are different (as expected):
Validator::make($request->all(), [
'email' => ['required', 'unique:users'],
]);
But if I do this, in an attempt to group the unique condition by platform, then all signups are allowed even when platforms are the same:
Validator::make($request->all(), [
'email' => ['required', 'unique:users,platform,site1'],
]);
Is there a way to set this up?
You can specify where conditions in the unique rule.
'email' => [
"required",
Rule::unique('users')->where(fn ($query) => $query->where('platform', request()->platform)), //assuming the request has platform information
];
And, to ensure uniqueness at the database level, you might want to define the email and platform as a composite unique key
In the migration:
$table->unique(['email','platform']);
Reference: https://laravel.com/docs/9.x/validation#rule-unique under the headline: Adding Additional Where Clauses:
https://laravel.com/docs/9.x/migrations#creating-indexes to get more information about creating composite indexes in Laravel.
Advice: RTFM
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