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Laravel rules

Every parameter which is not an admin parameter is passed to the Laravel validator as a rule, so email, url, in:a,b, unique:table,column or regex:/pattern/ work as they are.
The same rules validate the admin form and your own requests through Model::validator().
An unknown parameter becomes a Laravel rule too. A typo such as phone on a string field throws Method validatePhone does not exist when the record is saved. A parameter value can not contain |, use the array notation or a rule object for such rules.

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Required fields

required makes the field mandatory. The column is created as NOT NULL and the form shows an asterisk. Every optional field gets the nullable rule automatically.
  • A required date, time or file field refuses an empty value, although these types are nullable by default.
  • A required file is not required again when editing a record which already has a file, only after the file is removed.
  • A required locale field requires only the default language.
  • required is skipped in the admin form for removeFromForm and disabled fields, their posted value is ignored as well.
  • hideOnCreate only hides the input, a required field is still validated when creating.
  • When a field becomes required and the existing column contains NULL values, admin:migrate keeps the column nullable and prints a warning.
  • In array notation use a real boolean, 'required' => false keeps the field optional.

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Nullable column

null creates a nullable column even for a required field. Use it when records are created from code without the value, while the admin form still requires it.

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Length and value limits

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Maximum length of a text, maximum value of a number or maximum size of a file in kilobytes. On string and select fields it also sets the column length, max:1000 creates varchar(1000). String fields have max:255 by default.On a multiple select it limits the number of selected values in the form, on multiple files it limits the size of every file.name:Perex|type:text|max:500
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Minimum length of a text or minimum value of a number. min:0 on integer and decimal fields creates an unsigned column, a negative minimum keeps it signed.name:Balance|type:integer|min:-100
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Shortcut for min:0, negative values are refused and the column is unsigned. A min written on the field wins.name:Stock|type:integer|unsigned

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Conditional required rules

Laravel required_if, required_unless, required_with and required_without rules work as usual. The form shows the asterisk dynamically by the current values of the other fields. required_with_all and required_without_all are validated, but without the asterisk.

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Password confirmation

confirmed adds a second input {key}_confirmation below the field, both values must match. An empty password on edit is ignored, so the password stays unchanged.

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File extensions

extensions lists the allowed file extensions of a file field. The file content must match one of the listed types as well. With multiple every file is checked.

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Unique value in a JSON column

unique_json checks that a value is unique inside a JSON column. For locale fields each language is checked separately. Parameters: table,column,exceptId,exceptColumn,column,value…. column->key compares a fixed JSON key.

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Partial updates

A checkbox with sometimes which is missing in the request is not reset to 0 by Model::validator()->getData(), so partial API updates keep its value. The admin form always sends unchecked checkboxes as 0.

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Arrays and multiple values

multiple and multirows add the array rule. Rules of multiple file, date and time fields are applied to every item (images.*). Date types validate values with date_format_multiple, which passes when the value matches any of the listed formats (d.m.Y, Y-m-d and the ISO strings sent by the date picker). You can replace the list for a custom input: