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Reference: Model rules validation

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Reference: Model rules validation

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Form validation, model, validation, reference, validation rules, validator

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[...]
If this option is not set, the rule will be applied in any scenario.
See the section [Scenarios][#Scenarios] for details.
+ *message*: replaces the default error message if validation fails.
+ *...validation parameters...*: any number of extra parameters to be used by the specified validator.

**Note**: You may get into trouble when using model's attributes as additional parameters for validators. Take a look at: [https://github.com/yiisoft/yii/issues/3001](https://github.com/yiisoft/yii/issues/3001 "https://github.com/yiisoft/yii/issues/3001")
 

### Choice of validators
[...]
through the `"on" => "scenario"` parameter.


 
## Validation rules reference

For each rule, the list of its specific arguments is given with the eventual default value *(in italics)*.
[...]
7. **tooSmall**, the error message used when the uploaded file is too small.
8. **types**, a list of file name extensions that are allowed to be uploaded. *(null, meaning all extensions)*
9. **wrongType**, the error message used when the uploaded file has an extension name that is not listed among extensions.
 
10. **mimeTypes**, a list of MIME-types of the file that are allowed to be uploaded. *(requires fileinfo PHP extension)*
 
11. **wrongMimeType**, the error message used when the uploaded file has a MIME-type that is not listed among mimeTypes.


### `filter` : [CFilterValidator]
[...]
* [CUniqueValidator]
* [CUnsafeValidator]
* [CUrlValidator]
 
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Version: 1.1
Category: How-tos
Tags: Form validation, model, reference, validation, validation rules, validator
Written by: krillzip
Last updated by: Rodrigo
Created on: Nov 29, 2009
Last updated: 11 years ago
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