I have a named query in a domain class:
class Store {
static namedQueries {
openOnWeekends {
// some conditions here...
}
}
}
I know that I can do Store.openOnWeekends.list(), but I want to do something like this:
def pickupWeekendStores = Order.get(params.id).books.store.openOnWeekends
Is there a way to use named queries like that? Any suggestions on how to get the stores open on weekends?
Edit:
Order hasMany Book, Book hasMany Store
Named queries support additional criteria at invocation, so you could try:
Store.openOnWeekends {
books {
'in'('id', Order.get(params.id).books.collect { it.id })
}
}
Does doing something like:
Set<Store> pickupWeekendStores = Order.get(params.id).books*.store.collect { it.openOnWeekends.list() }
work?
Related
I have the following domain classes (Only trying to show what is needed to get the idea) :
class Scholarship {
static hasMany = [grades:Grade]
}
and
class Grade {
String id
String description
}
In words I would like to, "Get all scholarships where the associated grade_id = myId". I would like to accomplish this using grails domain classes and not using sql. Any help appreciated
Are you looking for something like this?...
def results = Scholarship.withCriteria {
grades {
// myId must be defined somewhere above...
idEq myId
}
}
EDIT
A comment below adds to the original question and asks what if another relationship was expressed like this...
class Scholarship {
static hasMany = [grades:Grade,majors:Major]
}
The query I show above would still be exactly the same. The fact that there is a majors collection would not be relevant unless you wanted to include some attribute of Major to also be part of the criteria, which could look something like this...
def results = Scholarship.withCriteria {
grades {
// myId must be defined somewhere above...
idEq myId
}
majors {
// only return Scholarship instances which
// contain a Major with the name 'Mechanical Engineering'
eq 'name', 'Mechanical Engineering'
}
}
I hope that helps.
class Client {
String name
static hasMany = [courses:Course]
}
class Course {
String name
static belongsTo = [client:Client]
}
I have this and I want to get all Clients that has a Course with name = "blabla"
I was trying to do : Clients.findWhere(Course.any { course -> course.name = "math" })
You can do this with criteria:
Client.withCriteria {
courses {
eq('name', 'math')
}
}
I believe that the following where query is equivalent to the above criteria:
Client.where { courses.name == 'math' }
or you may find you need another closure:
Client.where {
courses {
name == 'math'
}
}
but I rarely use where queries myself so I'm not 100% sure of that.
There are probably a lot of different syntactical expressions to achieve the same thing. I can say definitively that this works in my project though.
def ls = Client.list {
courses {
eq('name','math')
}
}
Have the following Domain modal:
class TransactionHeader {
static hasMany = [details: TransactionDetail]
}
class TransactionDetail {
static belongsTo = [header: TransactionHeader]
Product product
}
I'm trying to write a criteria query that will return all the TransactionHeader rows that contain TransactionDetails with 2 different Products. This is what I have so far and it isn't doing exactly what I'm after:
def list = TransactionHeader.withCriteria {
details {
and {
eq("product", product1)
eq("product", product2)
}
}
}
What's happening is it is return rows that contain at least 1 detail with 1 of the products. I need rows that have 2 details, each with one of the products.
Feels like you want to move details out of that, so actually
def list = TransactionHeader.withCriteria {
and {
details {
eq("product", product1)
}
details {
eq("product", product2)
}
}
}
Not sure how hibernate / gorm will deal this, though.
Have you tried using the "in" statement in your criteria dsl?
def list = TransactionHeader.withCriteria {
and {
details {
'in'("product", [product1, product2])
}
}
}
Assume a domain class called User. User class looks like this:
class User {
List<String> values
}
The collection values contains strings like "http://example.com/x", "http://google.com/y", "http://google.com/z" and so on...
Let's say we want to build a query which gets all the users that have specific string in the collection values (e.g. "google.com"). Something like this:
def criteria = User.createCriteria()
def results = criteria.listDistinct () {
and {
user.values.each { like('someField', '%${it}%') }
}
}
Any ideas?
I have found the answer by experimentation. The solution is:
def criteria = User.createCriteria()
def results = criteria.listDistinct () {
and {
user.values.each { like('someField', '%'+it+'%') }
}
}
I am not sure what you are doing with your suggested answer.
I have never seen that usage of each in the criteria query before.
This question has been asked many times before but never given an answer.
The problem is that you are queriyng a String association, which is not a domain class. If you would make your own String domain class for example ondrej.String { String strValue } then you would be able to do :
User.withCriteria {
values { ilike("strValue", "...") }
}
The problem is not having access to the value of the String object. The value of the String class is called value, but it is a char array, so I do not believe the following will work:
User.withCriteria {
values { ilike("value", "...") }
}
You could try using :
User.withCriteria {
values { ilike("toString", "...") }
}
or something else instead of toString ... I do not have the possibility to test this right now.
Hope that helps
After a lot of trying and researching, I found this will work with Grails 2.4.0, I don't know about older versions.
Cat.withCriteria {
createAlias('nicknames', 'n')
ilike 'n.elements', '%kitty%'
}
The trick is to use 'n.elements'
I'm writing some named queries for my domain classes in Grails and I've hit a blocker.
Given the following domain class:
class Contributor {
// evals is a collection of another domain class
def evals
static namedQueries = {
hasNoEvals {
// Something like this...
evals.size() == 0
}
}
}
Can anyone help with the syntax I need to select the Contributors who have no Evals?
Thanks.
Please look in createCriteria doc for "collection property" operations. In your case, it is isEmpty:
static namedQueries = {
hasNoEvals {
isEmpty('evals')
}
}
For generic size restriction, it is sizeEq, sizeLe and so on.