UnMapped property on the Angular/Breeze SPA template

Question

I am using the Angular/Breeze SPA template in visual studio 2012. I have added an unmapped property in the TodoList server model.

[NotMapped]
public string M         


        

Answer 1

Did you find a solution to this problem? I have been struggling with the same problem and just recently found this SO post by CassidyK, in which he solves a very similar problem by changing a single line in the Breeze source code (breeze.debug.js). Here is the code snippet he changed (taken from CassidyK's post):

proto.initializeFrom = function (rawEntity) {
    // HACK:
    // copy unmapped properties from newly created client entity to the rawEntity.
    // This is so that we don't lose them when we update from the rawEntity to the target.
    // Something that will occur immediately after this method completes. 
    var that = this;
    this.entityType.unmappedProperties.forEach(function(prop) {
        var propName = prop.name;
        that[propName] = rawEntity[propName];  // CassidyK 
        //rawEntity[propName] = that[propName]; // Breeze 
    });

    if (!this._backingStore) {
        this._backingStore = { };
    }
};

I have tried this solution and it seems to work just fine. Notice that this change will probably get you into trouble if you ever have a case in which you have a server side property that's not mapped in the database, and need the client side to overwrite this value when the object is created at the client side.