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@BatchSize but many round trips when fetching a @ManyToOne association


@BatchSize but many round trips when fetching a @ManyToOne association

By : user2948161
Date : November 14 2020, 04:48 PM
With these it helps The @BatchSize makes sense on both
One-To-Many and Many-to-One as well
code :
@Entity
@BatchSize(size=25)
@Table(name = "activite" ...
public class Activite implements java.io.Serializable {
...
<class name="Person" batch-size="10">...</class>


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Entitiy Framework - DB round trips

Entitiy Framework - DB round trips


By : user2296379
Date : March 29 2020, 07:55 AM
hope this fix your issue You can use EFTracingProvider from MSDN code gallery.
@ManyToOne and @BatchSize

@ManyToOne and @BatchSize


By : Mikko
Date : March 29 2020, 07:55 AM
I wish this help you @ManyToOne associated with @BatchSize could make sense only if the corresponding field is marked as lazy (lazy=true).
Indeed, if the field is not lazy, it's by definition already loaded since the enclosing entity is loaded, so the problem of database calls doesn't apply.
Graphql and round trips. Is this just an ios app issue?

Graphql and round trips. Is this just an ios app issue?


By : Rostov
Date : March 29 2020, 07:55 AM
this one helps. So generally speaking, network traffic inside the system you control (i.e. your backend) is fast. A request that make take 205ms (200ms network, 5ms data) to the outside world, might take just 6ms (1ms network, 5ms data) internally.
If you want to build a screen of your app, and that requires making two REST requests because the 2nd depends on the result of the first, you're looking at (given these crude numbers) 410ms to get the data you need to render your screen.
Reducing round-trips to database

Reducing round-trips to database


By : Frank Kearney
Date : March 29 2020, 07:55 AM
With these it helps Why don't you get all data you need by one query with joins and then filter in on a client-side; Or other way you can do it (it there's not too much data) is getting data as xml, deserialize it to ienumerable an iterate through.
As i see it you do
Not fetching ManyToOne eager association in Spring Data Rest

Not fetching ManyToOne eager association in Spring Data Rest


By : Annyy07
Date : March 29 2020, 07:55 AM
Hope this helps Well, I have found the cause but still don't understand is it possible to configure.
For User-Role relationship, Role is returned as embedded JSON object of User, because there is no repository defined for Role entity. But House and Flat both has corresponding JpaRepository, and house is returned as only URL in Flat JSON object. It seems that Spring Data REST automatically substitutes entity with REST link in JSON always when it is possible to get it with REST. Once I removed House repository from project, JSON response for Flat turned to the form I wanted, with embedded House:
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