create new entity with new entity type in breeze

Question

I'm writing cordova + angular + breeze app where text info from element should be stored in the cash of browser that wraps the app. Accordind to the docs to do so, first I need to create new entity type in breeze. I do the following:

var entityManager = new breeze.EntityManager("api/Northwind");
var newType = new breeze.EntityType({
    shortName: "input"
});

Next I'm trying to create new entity of this type:

var newEntity = newType.createEntity();

This fails with message: "TypeError: Cannot read property '_ctorRegistry' of undefined"

Is seems to be very basic functionality of breeze but I can't get it work for 2 days already. Could anyone help me with that?

As the accepted answer indicates, there are at least 3 problems here. (1) the new type must be added to a MetadataStore ... almost certainly the one that belongs to the manager (manager.metadataStore) and (2) the new type should have some properties ... at least a key property. Now Breeze will think you can persist this to the server so you better guard against that. I find myself wondering "Why is Qvatra creating a pretend entity that can't be persisted?". You may have a good reason but it seems a dubious move on it face. — Ward
– Ward, Commented May 16, 2014 at 22:55

Didar_Uranov · Accepted Answer · 2014-05-14 14:20:02Z

1

After created new EntityType, you should attach it to metadataStore to create entities of new type. Your code should look:

var metadataStore = new breeze.MetadataStore();
entityManager= new breeze.EntityManager({
            serviceName: "api/db",
            metadataStore: metadataStore
        });

// if you call fetchMetadata()
entityManager.fetchMetadata().then(function(){
    var newType = new breeze.EntityType({
        shortName: "input"
    });

    entityManager.metadataStore.addEntityType(newType);

    newType.createEntity(...);
    // ...
});

//or just use var metadataStore
var newType = new breeze.EntityType({
    shortName: "input"
});

entityManager.metadataStore.addEntityType(newType);

newType.createEntity(...);
// ...

answered May 14, 2014 at 14:20

Didar_Uranov

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