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Breeze - Getting All Navigation Properties For Array of Entities


Breeze - Getting All Navigation Properties For Array of Entities

By : msh
Date : November 21 2020, 07:31 AM
With these it helps I think this might be a typo or some out of date information on the navigation properties documentation page. According to the API documentation for EntityQuery.fromEntityNavigation, the first parameter should be a single entity, not an array. Took a look at the breeze code, didn't see any evidence that an array of entities could be passed.
As a workaround, you could construct the query a bit differently. Continuing with the Order/OrderDetails scenario, you could do something like this:
code :
var subsetOfOrders = ..., // array containing the subset of orders whose OrderDetails we need to load
    predicates = subsetOfOrders.map(function(order) { return new breeze.Predicate('OrderId', '==', order.OrderId()); }),
    predicate = breeze.Predicate.or(predicates),
    query = new breeze.EntityQuery('Orders').expand('OrderDetails').where(predicate);

manager.executeQuery(query)...
var subsetOfOrders = ..., // array containing the subset of orders whose OrderDetails we need to load
    predicates = subsetOfOrders.map(function(order) { return new breeze.Predicate('OrderId', '==', order.OrderId()); }),
    predicate = breeze.Predicate.or(predicates),
    query = new breeze.EntityQuery('OrderDetails').where(predicate);

manager.executeQuery(query)...


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Breeze 1.3.5 with odata and Navigation properties

Breeze 1.3.5 with odata and Navigation properties


By : Lam Le
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Yes, there is something wrong with the metadata from the Web API OData. It is missing the foreign keys that support those navigations!!!
WCF OData metadata provides the FK information ... which is why Breeze works with that kind of OData source. But the FK info are missing from the Web API OData metadata as of this writing. We are talking to the team about that.
Breeze returns navigation properties in the metadata, but not on the entities

Breeze returns navigation properties in the metadata, but not on the entities


By : wen
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further The only reason that you would be missing referential constraints in your model is if the Entity Framework thinks that you are not exposing foreign keys. See Foreign keys in the Entity Framework.
Breeze requires the foreign keys in order to perform it's automatic object linking logic.
Does Breeze.js support querying for entities with an empty one-to-many navigation property?

Does Breeze.js support querying for entities with an empty one-to-many navigation property?


By : Ioana
Date : March 29 2020, 07:55 AM
wish of those help For the time being, you can accomplish the same effect by comparing any nonnullable column with null in the 'any' subquery. For example:
code :
var p = Predicate.create("orders", "any", "rowVersion", "!=", null).not();
var query = EntityQuery.from("Customers").where(p).expand("orders");
Breeze navigation properties

Breeze navigation properties


By : Shehab Saeed
Date : March 29 2020, 07:55 AM
I wish this helpful for you I just tried it and it worked for me without any issue.
I see a typo in the snippet you copied in the question. Name of your navigation property defined in the Item class is Group, but you passed "Groups" to the Include function. Can you try it by fixing the typo and update if you still face the issue?
Breeze navigation properties not loaded

Breeze navigation properties not loaded


By : Kate Petrook
Date : March 29 2020, 07:55 AM
this will help I would start by checking the EntityManager's metadataStore to make sure that the ProjectMember entityType can be found. You can do this after your first query via
code :
var projectMemberType = myEntityManager.metadataStore.getEntityType("ProjectMember");
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