Validation Constraints Reference
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The Validator is designed to validate objects against constraints. In real life, a constraint could be: "The cake must not be burned". In Symfony, constraints are similar: They are assertions that a condition is true.
Supported Constraints
The following constraints are natively available in Symfony:
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.