Questions tagged [fetching-strategy]
78 questions
3
votes
1 answer
NHibernate AliasToBeanResultTransformer & Collections
I would like to return a DTO from my data layer which would also contain child collections...such as this:
Audio
- Title
- Description
- Filename
- Tags
- TagName
- Comments
- PersonName
- CommentText
Here is a basic query so…
Paul Hinett
- 1,951
- 2
- 26
- 40
3
votes
1 answer
Fetching strategy encapsulation for Entity Framework 4.1 and NHibernate
I created a project to test out NHibernate 3+ vs. Entity Framework 4.1, wrapping it in a repository, making it very testable using interfaces etc.
I do not want to expose either ORM outside of the repositories (I do not even expose IQueryables). …
junkyspace
- 365
- 4
- 15
3
votes
1 answer
Disabling Hibernate's recursive fetch
Current stack:
Spring Boot 1.5.1
Spring Data JPA 1.11.0
Hibernate Core 5.2.6
Let's say we have the following @Entity structure
@Entity
class Root {
@Id
private Long id;
@OneToMany
@JoinColumn(name = "root_id")
private…
rorschach
- 2,871
- 1
- 17
- 20
3
votes
2 answers
SetFetchMode call ignored
I have a problem with SetFetchMode call in Criteria API in following query:
DetachedCriteria.For()
.Add(u => u.Status == UserStatus.Live)
.CreateAlias("UniqueId", "uid")
…
Sly
- 15,046
- 12
- 60
- 89
3
votes
4 answers
CascadeType vs FetchType
I would like to now what is the difference between CascadeType and FetchType in Hibernate?
They seem very similar but I guess they are not interchangeable, right?
When to use them? Can they be used both at the same time?
jarosik
- 4,136
- 10
- 36
- 53
2
votes
1 answer
Join two data tables from different source databases in .NET?
How do you join two data tables from different source databases in .NET? Ideally, I can craft two queries manually and simply join on a single field.
In this case, linked servers and scheduled imports are not an option. I've looked into the data…
Marc
2
votes
2 answers
Hibernate ignores FetchType for Single Inheritance
I have 3 entities inheriting from another entity.
I'm using the strategy Single_Table
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
E.g. Class B,C and D inherite from A
On entity B I'm loading another entity X eagerly. Unfortunately,…
Daniel
- 834
- 1
- 9
- 25
2
votes
1 answer
Fetch the smallest date of an object in CoreData
I'm having the same problem as this question, but the answer of @davedelong is not working for me.
When following the Apple Example, for fetching the smallest date in a set of object I get the following error
-[NSDate count]: unrecognized selector…
gcamp
- 14,622
- 4
- 54
- 85
2
votes
2 answers
Grails automatic relational fetching
Is is possible to do automatic relation fetching in GORM / Grails?
class Person {
static hasMany = [cars : Car]
}
class Car {
static belongsTo = [owner : Person]
}
Then use this relation like:
person = Person.get(1);
person.cars.each() {…
Josh K
- 28,364
- 20
- 86
- 132
2
votes
2 answers
How to set NHibernate Linq fetch strategy through a façade layer
I’m using NHibernate for data access, but accessing it through a façade layer. This layer consists of interfaces for the repositories, plus an IUnitOfWork interface which corresponds to the ISession object.
In order that retrieved entities are…
David
- 15,750
- 22
- 90
- 150
2
votes
4 answers
Hibernate fetching in criteria ignored
I have some class User which has one to many relation to LoginSession class (I have a collection of LoginSessions in my User class).
@Entity(name="T_User")
public class User()
{
....
@OneToMany(fetch=FetchType.LAZY, mappedBy="user",…
vlio20
- 8,955
- 18
- 95
- 180
2
votes
0 answers
NHibernate: is there limitation of batch-size to 10 items?
I am having a problem with NHibernate (SQL Server 2000, if it matters).
It seems like NHibernate uses batch-size equal to 10 even if I specify 500 (but if I specify size less than 10, say 3 - it uses 3)
Konstantin Spirin
- 20,609
- 15
- 72
- 90
2
votes
1 answer
How to change hibernate's default fetching strategy?
I know hibernate's default fetching strategy is LAZY for collections, is there a way to change the default fetching strategy system wide through configuration file?
nimcap
- 10,062
- 15
- 61
- 69
1
vote
1 answer
What is a Fetching Strategy?
I understand the core concept of retrieving data using different strategies. But I cannot find a good summary/definition..
Is it a design pattern? Does it fit within a broader design pattern?
Is it specific to ORM implementations? (Hibernate comes…
DaveO
- 1,909
- 4
- 33
- 63
1
vote
2 answers
Get eagerly collection of entities containing other eagerly got collections
I've got stuck on the M:N relation between entity and strings. An user can have more than one role and each role can be assigned to more than one user. Role is just a string. Roles are contained in table with two columns: roleId and roleName.
I've…
Theodor Keinstein
- 1,653
- 2
- 26
- 47