Breeze.js - Getting both client and server validation errors onto my entity

Question

Based on Breeze documentation I have the following solution to add any client side validation errors to a property (fieldsWithErrors) on my entity. This works well and I can grab the relevant error to a particular property and apply css classes to indicate validation errors to the user. episodeManager is my EntityManager and Reminder is my entity.

episodeManager.metadataStore.registerEntityTypeCtor("Reminder", sr.Reminder, function (entity) {

    entity.fieldsWithErrors = ko.observableArray([]);

    entity.entityAspect.validationErrorsChanged.subscribe(function () {

        entity.fieldsWithErrors.removeAll();

        var errors = entity.entityAspect.getValidationErrors();

        $.each(errors, function () {

            entity.fieldsWithErrors.push(this.propertyName);
        });
    });
});

I've added some server side validation in the form of custom .Net attributes (the client side validation errors above are Breeze cloning [Required] attributes into rules, I have no custom Breeze validation rules). Any violation of these server-side rules are returned to Breeze in the fail() promise after saveChanges(). I can't think of a clean way to combine these into my fieldsWithErrors entity property alongside any client side errors as if they were all the same. Is there a much simpler way to do this?

Jay Traband Jay Traband · Accepted Answer · 2013-07-29T15:52:55

As of Breeze v 1.4.0, your server side validation failures should automatically be added to the client side validationResults on a per entity basis, ( in addition to be returned in fail() promise), so you shouldn't have to do anything else.

Am I missing something?

Breeze.js - Getting both client and server validation errors onto my entity

1 Answers