[英]How to write a date validator with grails command object?
I want to add a date expression validator in my command object, but I'm not sure what's the correct syntax... 我想在命令对象中添加一个日期表达式验证器,但我不确定正确的语法是什么......
class UserController {
…
}
class DateServiceCommand {
String date //valid format is DD-MMM-YYYY, 01-APR-2011
static constraints = {
date(blank:false, ??? )
}
}
You can use a custom validator : 您可以使用自定义验证器 :
import java.text.*
class DateServiceCommand {
String date
static constraints = {
date blank: false, validator: { v ->
def df = new SimpleDateFormat('dd-MMM-yyyy')
df.lenient = false
// parse will return null if date was unparseable
return df.parse(v, new ParsePosition(0)) ? true : false
}
}
}
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