Grails GORM整数验证 [英] Grails GORM integer validation

问题描述

环境：Grails 2.0.4，Java 1.6.0

我想对需要整数值的Domain Object值施加约束来防止小数点从输入的值。在视图中输入3.3会导致创建的对象的值为3.我希望验证错误会被踢回给用户，表明只有整数值是有效的。

  class ADomainObject {
整数anInteger 
} 
  

Controller

  def save（）{
 //注意：params [anInteger] =3.3
 
 ADomainObject aDomainObject = new ADomainObject（params）
 aDomainObject.save flush：true 
} 
  

aDomainObject.anInteger = 3的持久化结果

导致失败需要哪种类型的约束？我已经尝试使用范围约束[0..1000]，无济于事。

解决方案

您可以注册一个自定义整数的属性编辑器仅允许严格的整数值。

 类IntegerEditor扩展了java.beans.PropertyEditorSupport {
 void setAsText（String text 
 value = Integer.parseInt（text） （org.springframework.beans.PropertyEditorRegistry registry）{
 registry.registerCustomEditor（Integer，new IntegerEditor（））
} 
} 
  

，然后在resources.groovy中：

  beans = {
 customPropertyEditorRegistrar（CustomPropertyEditorRegistrar）
} 
  

Environment: Grails 2.0.4, Java 1.6.0

I'd like to put a constraint on a Domain Object value requiring an integer value to prevent a decimal value from being entered. Entering 3.3 in the view results in the object being created with a value of 3. I was hoping for a validation error that would be kicked back to the user indicating only integer values are valid.

class ADomainObject {
    Integer    anInteger
}

Controller

def save() {
   // Note: params["anInteger"] = "3.3"

   ADomainObject aDomainObject = new ADomainObject(params)
   aDomainObject.save flush:true
}

Result in the persistence of aDomainObject.anInteger = 3

What type of constraint would be needed to cause a failure? I've tried using a range constraint, [0..1000], to no avail.

解决方案

You can register a custom property editor for Integers to only allow strictly Integer values. The following will apply to binding all Integers.

class IntegerEditor extends java.beans.PropertyEditorSupport {
    void setAsText(String text) {
        value = Integer.parseInt(text)
    }
}

class CustomPropertyEditorRegistrar implements org.springframework.beans.PropertyEditorRegistrar {
    void registerCustomEditors(org.springframework.beans.PropertyEditorRegistry registry) {
        registry.registerCustomEditor(Integer, new IntegerEditor())
    }
}

and then in resources.groovy:

beans = {
    customPropertyEditorRegistrar(CustomPropertyEditorRegistrar)
}

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