how to bind a subcategory list by selecting an item in another list?

[ZHosseinpour]

i have an 'option groups' which return main categories,with selecting one main category i want to list subcategory in the drop down

[ChenRoth-old]

here's a simplified example of how you can achieve this.

in your schema

main: {
   autoform: { 
       options: ['m1','m2','m3']
  }
},

sub: {
   autoform: { 
      options: function() { 
            var main = AutoForm.getFieldValue(AutoForm.find().formId, 'main');
            switch (main) {    
                   case "m1": return ["s1a","s1b","s1c"];
                   case "m2": return ["s2a","s2b","s2c"];
                   case "m3": return ["s3a","s3b","s3c"];                
            }  
         }
     }
}

[ZHosseinpour]

Thanks