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Table of Contents

 

Available Atomic Validators

These are the building blocks used for creating complex validators:

 

validator/usagedescription
notnull();Check that the attribute is not null. This validator does not take any arguments.
regex("^[A-Z a-z]*$");

Checks that the value conforms to a regular expression. Allows upper & lower case and spaces.

regex("^[A-Za-z0-9 ]*$");Another regex example. Alphanumeric with spaces.
regex("^27[0-9]*$");Another regex example. Number starting with 27.
regex("\b[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+[.][A-Za-z]{2,4}\b");Another regex example. Email.
minval(3.145);

Checks that the value is not less than the supplied minimum value.

maxval(6.18);

Checks that the values is not greater than the supplied maximum value.

minlen(2);

Checks that a string value does not have less characters than the supplied minimum value.

maxlen(255);

Checks that a string value does not have more characters than the supplied maximum value.

 

 

 

Creating Complex Validators

In a .mez file, under ./model/, use the validator keyword followed by a validator name, followed by a block containing atomic validators:

Code Block
languagejava
titleValidator Examples
linenumberstrue
validator FirstnameValidator {
    notnull; minlen(2); maxlen(250);
}
validator AgeValidator {
    minval(0);
}
 
validator CTMetroPhoneNumber {
    notnull(); regex("021-[7..9]{7}");
}

 

 

 

Annotating Object Attributes with Validators 

Annotations that start with @ followed by an ID (validator name), and that are used on object attributes are validator annotations. The ID value must be the same as any validator that is defined in the application:

 

Code Block
linenumberstrue
object Person
{
    @FirstnameValidator("validr.msg.fname")
    string fname;
 
    @SurnameValidator("validr.msg.sname")
    string sname;
}

 

 

 

Additional Mentions and References

 

Excerpt
hiddentrue

 notnull() etc. | validator | validator annotations