How to use the validation rule :unique on a data by comparing only a foreign_key

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I have a types table with these columns :

  • id
  • name
  • team_id

I would like to make the name field unique. That is to say that if I add the type "Big", I could'nt add the type "Big" again.

I tried this :

public function store(Request $request)
{
    $this->validate($request, [
        'name' => 'required|min:2|unique:types,name'
    ]);

    ...
}

If I do that, it works. But if another team adds a type that already exists in database, it tells me that the type already exists.

What I would like to do is make the type unique only for everyone data who has the same team_id

It's possible ?

Thank you very much !

Try the following:

public function store(Request $request)
{
    $this->validate($request, [
        'name' => 'required|min:2|unique:name'.$request->team_id
    ]);


    ...
}

Microsoft Access tips: Validation Rules, How and when to use Validation Rules on your fields and tables, in Microsoft Access databases. Validation Rules. Validation rules prevent bad data being saved in your table. Use the table's rule to compare fields. Accept digits (0 - 9​) only, Is Null OR Not Like "*[!0-9]*", Any character outside the range 0 to 9 is rejected. You can use the Validation Rule property and the Validation Text property of a form control to validate data that is input to that control and to help users who input data that is not valid. Tip: If you create a form automatically from a table by using one of the Form commands on the ribbon, any validation for fields in the underlying table are inherited by the corresponding controls on the form.

primary key can't be repeated so you can't check that two team would have same team_id.

Professional Oracle® Programming, Note that UNIQUE constraints have no requirement for the data to be NOT For instance, you might own a production vehicle that is only used on a farm or a database requires data in one table to be validated by comparing it to data in other tables. We will use the term FOREIGN KEY constraint throughout this section  0 How to use the validation rule :unique on a data by comparing only a foreign_key Aug 11 '18 0 how to add vertical scrollbar in gridview in yii2 Jan 25 '17 0 Laradock - Localhost not working on Windows 7 using Nginx Sep 19 '19

why not use if condition. if name not unique, check if team_id unique or not

Validating Data - 3.8, Creating a Rules Checker; Creating Unique Field Rules; Foreign Key Rules use Cake\ORM\Table; use Cake\Validation\Validator; class or syntax of your data is correct, rules focus on comparing data against the existing When setting rules on foreign key fields it is important to remember, that only the  Validation Rules for fields. When you select a field in table design, you see its Validation Rule property in the lower pane. This rule is applied when you enter data into the field. You cannot tab to the next field until you enter something that satisfies the rule, or undo your entry.

You can use like this. https://laravel.com/docs/5.6/validation#using-closures

$this->validate($request, [
   `name` => [
                 `required`,
                 `min:2`,
                 function($attribute, $value, $fail) {

                    /* your query here for check name unique or not */                     

                    return $fail($attribute.` is invalid.`);
                 },
             ]
]);

Or Use Like This.

Rule::unique('types')->ignore($user->id),

Hope This Helps. :)

Unique Constraints and Check Constraints, Constraints are rules that the SQL Server Database Engine enforces for you. For example, you can use UNIQUE constraints to make sure that no duplicate A UNIQUE constraint can be referenced by a FOREIGN KEY constraint. that allows for only data that ranges from $15,000 through $100,000. Review examples of validation rules for various types of apps that you can use and modify for your own purposes. Validation rules verify that the data a user enters in a record meets the standards you specify before the user can save the record.

Example of a Custom Validation Rule with a Join Between Tables, Example of a Custom Validation Rule with a Join Between Tables. You can create a condition for a custom validation rule that joins data from two tables. To apply these Data Validation rules; First select the range of cells you want to apply the validation to. Click the Data tab and then the Data Validation button on the Ribbon. In the Settings tab, select the validation rule criteria.

Foreign Key Constraint, The `FOREIGN KEY` constraint specifies a column can contain only values Rules for creating foreign keys; Null values; Composite foreign key matching must use exactly the same columns as a UNIQUE or PRIMARY KEY constraint on the See below for more details on the differences between comparison methods. Type of formula used to write validation rules, perform calculations, create query criteria, control macros, and group and sort data in a report. Wildcard Characters Symbol used in an expression in a query to find records that match, or in a validation rule to require data being entered to match a specific character, number, or pattern.

TechXprs - Technology Express - Open SQL, These constraints are rules that validate data entries by enforcing column-to-​table and table-to-table relationships. A table can have only one primary key. A UNIQUE key can be referenced by a FOREIGN KEY can require a combination or range of values or can compare the value entered with data in other columns. b. if a foreign key has a value, it must match a value in the "master" table for that foreign key. In the database approach, the functions of data backup, control, and security. Are Centralized. If a data set has only one unique identifier, that unique identifier becomes the ___ of the data set.

Comments
  • Sorry @Hammadr097, it's exactly what I did It does not count team_id
  • I have amended my answer, kindly try again.