Validation Constraints Reference

The Validator is designed to validate objects against constraints. In real life, a constraint could be: “The cake must not be burned”. In Symfony2, constraints are similar: They are assertions that a condition is true.

Supported Constraints

The following constraints are natively available in Symfony2:

Basic Constraints

These are the basic constraints: use them to assert very basic things about the value of properties or the return value of methods on your object.

• NotBlank
• Blank
• NotNull
• Null
• True
• False
• Type

String Constraints

• Email
• MinLength
• MaxLength
• Url
• Regex
• Ip

Number Constraints

• Max
• Min

Date Constraints

• Date
• DateTime
• Time

Collection Constraints

• Choice
• Collection
• UniqueEntity
• Language
• Locale
• Country

File Constraints

• File
• Image

Other Constraints

• Callback
• All
• UserPassword
• Valid