DevForce Community Forum : Breeze without EF http://www.ideablade.com/forum/ This is an XML content feed of; DevForce Community Forum : Community Forum : Breeze without EF Fri, 10 Apr 2026 20:48:18 -700 Thu, 08 Nov 2012 04:41:27 -700 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 9.69 360 www.ideablade.com/forum/RSS_post_feed.asp?TID=3704 DevForce Community Forum http://www.ideablade.com/forum/forum_images/IdeaBlade_logo_tm.png http://www.ideablade.com/forum/ Breeze without EF : I'm in the same situation,... http://www.ideablade.com/forum/forum_posts.asp?TID=3704&PID=15151#15151 Author: munissor
Subject: 3704
Posted: 08-Nov-2012 at 4:41am

I'm in the same situation, I'm trying to use breeze in a project where a DbContext is not there.

The approach is was following was to try to create the metadata on the client side, attaching it to the metadataStore.

However, after  all the configuration the MetadataStore appears to be empty, and is still calling the Metadata endpoint.
This is the code I used for configuring an entity type.


var breeze = root.breeze;
var serviceName = 'http://.../api';
var metadataStore = new breeze.entityModel.MetadataStore();

// create a UserEntity
var userEntityType = new breeze.entityModel.EntityType({
    metadataStore: metadataStore,
    serviceName: serviceName,
    shortName: "User",
});
userEntityType.addProperty(new breeze.entityModel.DataProperty({ name: "Id", isPartOfKey:true }));
userEntityType.addProperty(new breeze.entityModel.DataProperty({ name: "Name" }));

breeze.core.config.setProperties({
    trackingImplementation: breeze.entityModel.entityTracking_ko,
    remoteAccessImplementation: breeze.entityModel.remoteAccess_webApi
});

// NOTE: at this point metadataStore.isEmpty() returns true
// but metadataStore.getEntityTypes() return the configured entity

// make the breeze manager available to the page as a property of the root object
root.ConfiguredEntityManager = new breeze.entityModel.EntityManager({
    serviceName: serviceName,
    metadataStore: metadataStore,
});




There is something that we are doing wrong?
]]> Thu, 08 Nov 2012 04:41:27 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3704&PID=15151#15151 Breeze without EF : Try to return the following... http://www.ideablade.com/forum/forum_posts.asp?TID=3704&PID=15053#15053 Author: pawel
Subject: 3704
Posted: 02-Nov-2012 at 12:49am

Try to return the following string:

{"conceptualModels":{"schema":{"xmlns":"http://schemas.microsoft.com/ado/2009/11/edm","xmlns:cg":"http://schemas.microsoft.com/ado/2006/04/codegeneration","xmlns:store":"http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator","namespace":"THE_NAMESPACE_OF_THE_DTO_CLASSES_HERE","alias":"Self","xmlns:annotation":"http://schemas.microsoft.com/ado/2009/02/edm/annotation","annotation:UseStrongSpatialTypes":"false","entityContainer":{"name":"Model1Container","annotation:LazyLoadingEnabled":"true"}}}}

The same as a string const (should be a single line):

const string emptyMeta = @"{\""conceptualModels\"":{\""schema\"":{\""xmlns\"":\""http://schemas.microsoft.com/ado/2009/11/edm\"",\""xmlns:cg\"":\""http://schemas.microsoft.com/ado/2006/04/codegeneration\"",\""xmlns:store\"":\""http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator\"",\""namespace\"":\""THE_NAMESPACE_OF_THE_DTO_CLASSES_HERE\"",\""alias\"":\""Self\"",\""xmlns:annotation\"":\""http://schemas.microsoft.com/ado/2009/02/edm/annotation\"",\""annotation:UseStrongSpatialTypes\"":\""false\"",\""entityContainer\"":{\""name\"":\""Model1Container\"",\""annotation:LazyLoadingEnabled\"":\""true\""}}}}";


Edited by pawel - 02-Nov-2012 at 12:57am]]> Fri, 02 Nov 2012 00:49:41 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3704&PID=15053#15053 Breeze without EF : how can i return empty metadata... http://www.ideablade.com/forum/forum_posts.asp?TID=3704&PID=15029#15029 Author: kaanse
Subject: 3704
Posted: 31-Oct-2012 at 11:55am

how can i return empty metadata when i tried to return null
i am getting same error
can you give a example about that 

thanx for help
]]> Wed, 31 Oct 2012 11:55:42 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3704&PID=15029#15029 Breeze without EF : Currently, you have to return... http://www.ideablade.com/forum/forum_posts.asp?TID=3704&PID=15027#15027 Author: jtraband
Subject: 3704
Posted: 31-Oct-2012 at 10:33am

Currently, you  have to return "some" metadata, but it can be empty.  We will change this in a later release but for now, just expose an empty EF model.]]> Wed, 31 Oct 2012 10:33:21 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3704&PID=15027#15027 Breeze without EF : when i return i querable objectits... http://www.ideablade.com/forum/forum_posts.asp?TID=3704&PID=15023#15023 Author: kaanse
Subject: 3704
Posted: 31-Oct-2012 at 8:23am

when i return i querable object 
its searching metedata fist how can i fix this 
i just want to take all data from method (getUnits)

-----------
    var serviceName = '/DocIndex';
    var manager = new entityModel.EntityManager(serviceName);
-----------

should i use something differnt  instead of "DataProperty" 

thanx for help




Edited by kaanse - 31-Oct-2012 at 8:31am]]> Wed, 31 Oct 2012 08:23:28 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3704&PID=15023#15023 Breeze without EF : Actually, we do use most of what... http://www.ideablade.com/forum/forum_posts.asp?TID=3704&PID=14853#14853 Author: jtraband
Subject: 3704
Posted: 15-Oct-2012 at 9:49am

Actually, we do use most of what is in the EDMX conceptual model.  But if you want to specify the metadata yourself, you can do something like this:

var fooEntityType = new breeze.entityModel.EntityType(myMetadataStore);
var dp1 = new breeze.entityModel.DataProperty(...);  // take a look at the api docs for DataProperty
fooEntityType.appProperty(dp1);
var dp2 = new breeze.entityModel.NavigationProperty(...); // take a look at the api docs for NavigationProperty

Most of the metadata that you will need to define is contained in the DataProperties and NavigationProperties that make up each EntityType.

]]> Mon, 15 Oct 2012 09:49:42 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3704&PID=14853#14853 Breeze without EF : I would like to provide Metadata()!... http://www.ideablade.com/forum/forum_posts.asp?TID=3704&PID=14848#14848 Author: pawel
Subject: 3704
Posted: 15-Oct-2012 at 2:48am

I would like to provide Metadata()! Just post some specification of what breeze expects. Currently I extract "ConceptualModels" this from EDMX, but I would like to know what is used and what is ignored (the string is rather long).]]> Mon, 15 Oct 2012 02:48:48 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3704&PID=14848#14848 Breeze without EF : Absolutely, this is supported.... http://www.ideablade.com/forum/forum_posts.asp?TID=3704&PID=14824#14824 Author: jtraband
Subject: 3704
Posted: 11-Oct-2012 at 11:17am

Absolutely, this is supported.  We simply haven't gotten around to documenting it or providing samples yet.   There are also still some rough edges here but we should have some basic information on this topic out within the next few weeks.

For now, the simplest way to get started with this right now is to simply return an IQueryable<Object> from your ApiController

public class MyController : ApiController {

    // We'll assume that you cannot provide this.
    // [AcceptVerbs("GET")]
    // public String Metadata() {
    //  return ContextProvider.Metadata();
    // }

  [AcceptVerbs("GET")]
    public IQueryable<Object> MyObjects() {
      var stuff =this.GetMyObjects().AsQueryable();
      return stuff;
    }
}

Notice that there is no ContextProvider in this case.  Querying for MyObject from the Breeze client then looks something like this:

  var query = EntityQuery.from("MyObjects")
            .where("City", "startsWith", "San")
            .take(5)
  var myEntityManager.executeQuery(query).then(...)

This assumes that the type of the instances returned by MyObjects contains a property "City".  The Breeze server side code will still translate your client side queries into valid linq queries against the IQueryable provided on the server. 

This query will return "plain" json objects withing the breeze promise method or callback.  If you want these objects to be converted to "first class" breeze entities during the query process, then you will need to provide metadata for each type returned.  This metadata is normally returned from the server but it can also be provided client side via the use of the EntityType, DataProperty and Navigation property ctors. (see the apidocs for more detail on this).

Hope this helps,




]]> Thu, 11 Oct 2012 11:17:16 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3704&PID=14824#14824 Breeze without EF : Can Breeze be used with WebApi,... http://www.ideablade.com/forum/forum_posts.asp?TID=3704&PID=14800#14800 Author: pawel
Subject: 3704
Posted: 10-Oct-2012 at 12:56am

Can Breeze be used with WebApi, but without Entity Framework? I have different ORM framework and would like to write custom DTO (POCO + DataAnnotations) for client/server communication. If this is already possible, please help me get started.
If this is currently impossible, are there plans to allow such scenarios?
]]> Wed, 10 Oct 2012 00:56:19 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3704&PID=14800#14800