AngularJS - Mapping REST search endpoint to $ resource

ng-resource returns an object with the following default actions

  { 'get':    {method:'GET'},
    'save':   {method:'POST'},
    'query':  {method:'GET', isArray:true},
    'remove': {method:'DELETE'},
    'delete': {method:'DELETE'} };

      

        
        
        
      

    

I'm not sure exactly what is the best method to query data from REST WebApi endpoints from AngularJS, but I implemented a Predicate Builder server to query my db using Linq. I have an endpoint (POST) named "Search ()" @ / api / Product / Search that will accept a searchCriteria JSON object, which is deserialized, fed into the Linq predicate builder, and executed against dbContext. My WebApi2 controller is structured this way using the new route attribute function:

  [RoutePrefix("Product")]
    public class ProductController : ApiController
    {
        [HttpGet]
        [Route("")]
        public IEnumerable<Product> Get()
        {
            try
            {
                return _productBL.Get();
            }
            catch
            {
                throw new HttpResponseException(HttpStatusCode.InternalServerError);
            }
        }

        [HttpGet]
        [Route("{productId}")]
        public Product Get(string productId)
        {
            try
            {
                var product= _externalWorkStepBL.GetById(productId);
                if (product== null)
                {
                    throw new HttpResponseException(HttpStatusCode.NotFound);
                }
                return product;
            }
            catch (Exception)
            {
                throw new HttpResponseException(HttpStatusCode.InternalServerError);
            }
        }

        [HttpPost]
        public HttpResponseMessage Post([FromBody]Product product)
        {
            try
            {
                _productBL.Insert(product);
                var response = Request.CreateResponse(HttpStatusCode.Created, product);
                response.Headers.Location = new Uri(Request.RequestUri, string.Format("Product/{0}", product.workItemID));
                return response;
            }
            catch
            {
                throw new HttpResponseException(HttpStatusCode.BadRequest);
            }
        }

        [HttpPost]
        [Route("Search")]
        public IEnumerable<Product> Where([FromBody] SearchCriteria searchCriteria)
        {
            if (searchCriteria == null || (searchCriteria.FieldContainsList == null || searchCriteria.FieldEqualsList == null || searchCriteria.FieldDateBetweenList == null))
            {
                throw new HttpRequestException("Error in, or null, JSON");
            }
            return _productBL.Where(searchCriteria);
        }

        [HttpPut]
        [Route("")]
        public HttpResponseMessage Put([FromBody]Productproduct)
        {
            try
            {
                _productBL.Update(product);
                var response = Request.CreateResponse(HttpStatusCode.OK);
                response.Headers.Location = new Uri(Request.RequestUri, string.Format("Product/{0}", product.Id));
                return response;
            }
            catch ()
            {
                throw new HttpResponseException(HttpStatusCode.InternalServerError);
            }
        }

        [HttpDelete]
        [Route("{productId}")]
        public void Delete(string productId)
        {
            HttpResponseMessage response;
            try
            {
                _productBL.Delete(productId);
                response = new HttpResponseMessage(HttpStatusCode.NoContent);
                response.Headers.Location = new Uri(Request.RequestUri, string.Format("Product/"));    
            }
            catch (Exception)
            {
                throw new HttpResponseException(HttpStatusCode.InternalServerError);
            }
        }
    }

      

        
        
        
      

    

On the client side, I've wrapped the $ resource in a factory called $ myResource, adding a PUT method. Then I use $ myResource for my other factories like this:

var app = angular.module('App', ['ngResource'])  
    .factory('$myResource', ['$resource', function ($resource) {
    return function (url, paramDefaults, actions) {
        var MY_ACTIONS = {
            'update': { method: 'PUT' }      
        };
        actions = angular.extend({}, MY_ACTIONS, actions);
        return $resource(url, paramDefaults, actions);
    }
}])
    .service('ProductFactory', ['$myResource', function ($myResource) {
        return $myResource('/api/Product/:productId')
    }]);

      

        
        
        
      

    

This works great, but now I want to add a search endpoint. Angular documentation for ng-Resource states that the url can be redefined in the action method, but it is not clear to me how to do this, I can add a "search" action to $ myResource, but how to change the url in the ProductFactory?

 .factory('$myResource', ['$resource', function ($resource) {
        return function (url, paramDefaults, actions) {
            var MY_ACTIONS = {
                'update': { method: 'PUT' },        
                'search': { method: 'POST','params': { searchCriteria: '@searchCriteria' }, isArray: true }   
            };
            actions = angular.extend({}, MY_ACTIONS, actions);
            return $resource(url, paramDefaults, actions);
        }
    }])  

      

        
        
        
      

    

As at present, the call to ProductFactory.search (searchCriteria) sends a POST request with correct JSON, but with the wrong URL "/ api / Product". I need it to send the message "/ api / Product / Search". How can I change $ myResource to use "api / xxx / Search" where xxx is the lookupname?