jQuery - How to dynamically add a validation rule

Question

I m trying to dynamically add a validation rule to some dynamic controls      input id  Hours    rules  add    required      However this line gives me the following error     data element form   validator   is null  Defining rules the static way with the validate function works fine  What am I doing wrong   Thanks  Justin

User · Answer

The documentation says   Adds the specified rules and returns all rules for the first matched element  Requires that the parent form is validated  that is    gt     quot form quot   validate   is called first   Did you do that  The error message kind of indicates that you didn t

User · Answer

You need to call  validate   before you can add rules this way  like this       myForm   validate      sets up the validator    input id  Hours    rules  add    required      The  validate   documentation is a good guide  here s the blurb about  rules  add   option       Adds the specified rules and returns all rules for the first matched element  Requires that the parent form is validated  that is     form   validate   is called first

User · Answer

As well as making sure that you have first called     myForm   validate     make sure that your dynamic control has been added to the DOM before adding the validation rules

User · Answer

In case you want jquery validate to auto pick validations on dynamically added items  you can simply remove and add validation on the whole form like below    remove validations on entire form     yourFormId        removeData  validator        removeData  unobtrusiveValidation       Simply add it again   validator      unobtrusive      parse   yourFormId

User · Answer

To validate all dynamically generated elements could add a special class to each of these elements and use each   function  something like      DivIdContainer  classToValidate   each function            this  rules  add             required  true

[jquery] jQuery - How to dynamically add a validation rule

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