JavaScript in OData portals

We have done odata services in CRM Portals to achieve through java script.

Step 1: Enable the portal entity list(Contact,Account,etc)

Go to Portal > Entity List. Create a new Entity List for Case Entity.

Step2: Enable Odata feed with entity type and views also in entity list

Step3: Now, To retrieve the data, Hit the URL in browser.

URL : Portal_URL/_odata  

      URL : Portal_URL/_odata/Entity_Set_Name : To retrieve the data

Here we can see the <atom:title type=”text”>Cases</atom:title>

Step4: Upload your JavaScript in your respective “entity form”.

Below script :

if (window.jQuery) {

   (function ($) {

      $(document).ready(function () {

         if (typeof (Page_Validators) == 'undefined') return;

         // Create new validator

         var newValidator = document.createElement('span');

         newValidator.style.display = "none";

         newValidator.id = "titleValidator";

         newValidator.controltovalidate = "title";

         newValidator.errormessage = "<a href='#title_label'>This Case has been already generated.</a>";

         newValidator.validationGroup = ""; // Set this if you have set ValidationGroup on the form

         newValidator.initialvalue = "";

         newValidator.evaluationfunction = function () {

       var count =   GetCase();

               if (count > 0 )

              return false;   // Return false mean apply validation.

             else

              return true;   // Return true mean successful.        

         };

         // Add the new validator to the page validators array:

         Page_Validators.push(newValidator);

         // Wire-up the click event handler of the validation summary link

         $("a[href='#title_label']").on("click", function () { scrollToAndFocus('title_label','title'); });

      });

   }(window.jQuery));

}

function GetCase(){

  var count = 0;

  var title=$("#title").val();

$.ajax({

    type: "GET",

    contentType: "application/json; charset=utf-8",

    datatype: "json",

    url: "~/_odata/Cases?$filter=title eq '"+title+"'",

    beforeSend: function(XMLHttpRequest) {

        XMLHttpRequest.setRequestHeader("Accept", "application/json");

    },

    async: false,

    success: function(data, textStatus, xhr) {

     count = data.value.length;       

    },

    error: function(xhr, textStatus, errorThrown) {

        Xrm.Utility.alertDialog(textStatus + " " + errorThrown);

    }

});

return count;

}

Step5: If duplicate case is created then it will show you like “This Case has been already generated.” Please refer to below screenshot.