Hi All,
I have a Author domain class with a 1-M relation with Book domain class.
I have set the fetchMode for the books collection to be eager. When I
add a book to an already existing author (retrieved from the db), and
save it, I get two Author instances with the same id and the same books
(including the new one). If the fetchMode is not set I get only one
updated Author instance and the results are correct. The relevant
snippet is as follows:
-----------------------------------------------
def author = new Author(name: "abc").addToBooks(new Book(name: "def"))
author.save(flush:true)
if(author.hasErrors())
println "hasErrors"
def results = Author.findAll()
println "${results.size()} $results"
author = Author.findByName("abc")
author.addToBooks(new Book(name: "xyz"))
author.save(flush:true)
if(author.hasErrors())
println "hasErrors"
results = Author.findAll()
println "${results.size()} $results"
-----------------------------------------------
and the output is as follows:
-----------------------------------------------
1 [[Author(id = 1)(name = abc)[Book(id = 1)(name = def)]]]
2 [[Author(id = 1)(name = abc)[Book(id = 2)(name = xyz)][Book(id =
1)(name = def)]], [Author(id = 1)(name = abc)[Book(id = 2)(name =
xyz)][Book(id = 1)(name = def)]]]
-----------------------------------------------
Any ideas on what is going on? Am I doing something wrong?
P.S. The detailed classes and the test is pasted below. I am using
grails 1.0.3, groovy 1.5.6.
Regards,
Abhijit
class Author {
String name
static hasMany = [books : Book]
static fetchMode = [books:"eager"]
String toString() {
def buffer = new StringBuffer()
buffer.append("[").append(getClass().name)
buffer.append("(id = ").append(id).append(")")
buffer.append("(name = ").append(name).append(")")
books.each {
buffer.append(it.toString())
}
buffer.append("]").toString()
}
}
class Book {
String name
static belongsTo = [author : Author]
String toString() {
def buffer = new StringBuffer()
buffer.append("[").append(getClass().name)
buffer.append("(id = ").append(id).append(")")
buffer.append("(name = ").append(name).append(")")
buffer.append("]").toString()
}
}
class AuthorTests extends GroovyTestCase {
void testSomething() {
def author = new Author(name: "abc").addToBooks(new Book(name:
"def"))
author.save(flush:true)
if(author.hasErrors())
println "hasErrors"
def results = Author.findAll()
println "${results.size()} $results"
author = Author.findByName("abc")
author.addToBooks(new Book(name: "xyz"))
author.save(flush:true)
if(author.hasErrors())
println "hasErrors"
results = Author.findAll()
println "${results.size()} $results"
}
}
1 [[Author(id = 1)(name = abc)[Book(id = 1)(name = def)]]]
2 [[Author(id = 1)(name = abc)[Book(id = 2)(name = xyz)][Book(id =
1)(name = def)]], [Author(id = 1)(name = abc)[Book(id = 2)(name =
xyz)][Book(id = 1)(name = def)]]]
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