gorm

I have to GORM domains, A & B, that relate to database tables. A has a one-to-many relationship with B. Because of this, the classes look similar to: class A { B b Long id } class B { Long id } When I retrieve an instance of A the ID of the corresponding instance of B is retrieved from the database. However, when I attempt to access that ID via something like: A a = A.get(11) Long bid = a.b.id the whole object is loaded from the database. In some cases I only want the ID of B (which has already been retrieved) and do not want to load the whole instance from the database. Is there a way to get

I have a domain object (Cat) like this: class Cat { String name static hasMany = [ nicknames: String ] } (A cat has a name, and also has many nicknames (which are Strings)) And I am trying to query all the cats with certain nicknames. I've tried this: PagedResultList getCatsByNickname(String nickname, Map params) { PagedResultList results = Cat.createCriteria().list(params) { 'ilike'('nicknames','%'+nickname+'%') } return results } But it never returns any results. (If I change the query to just use the simple name attribute, it works finding all cats with that name, but I want to query

I have a Grails application that will run against either a SQL Server or Oracle backend. I am using GORM as an ORM. I want to map a large text field in a way that supports both database types. In my Grails domain class I have something like: class Note { String content static constraints = { content nullable: false, blank: false } } I then declare database tables that look like this: -- oracle CREATE TABLE NOTE ( id NUMBER(19, 0) NOT NULL, version NUMBER(19, 0) NOT NULL, content CLOB NOT NULL ); -- SQL Server CREATE TABLE NOTE ( id NUMERIC(19, 0) NOT NULL, version NUMERIC(19, 0) NOT NULL,

For my application I need dynamic database connections at runtime. I know, there are ways to create multiple datasources but they are not that dynamically I think. Scenario: A user can enter database credentials and connect to a remote database to import single rows and tables to an other database. For this purpose I need to connect to the remote database dynamically. I've tried to do that in a service like they've said in If I use groovy sql class in grails, does it use the grails connection pooling? Note: GORM is dispensable in this case, I can use plain SQL instead. Any ideas? Thank you..

I'm trying to define a tree structure in GORM. Here is my model: class Tree { String name Level rootLevel static hasOne = [rootLevel: Level] static hasMany = [levels: Level] static mappedBy = [levels:"parentTree"] } class Level { String name Tree parentTree Level parentLevel Set<Level> subLevels static belongsTo = [parentTree: Tree] static hasMany = [subLevels: Level] } Insertion seems to work fine, but when I can't load a Tree with many levels and sublevels. I guess I missed something in the relations: - the Tree should have a reference to the rootLevel (and optionally to all sublevels) - a

I'd like to use the Grails feature for creating/updating database tables on a limited basis. Specifically, I'd like Grails to manage some tables, but not all. Is there a way to limit the tables managed by Grails or is it an all or nothing proposition? In general it's all or nothing since Grails uses Hibernate's HBM2DDL functionality. But you can intercept the process using a custom configuration subclass. Here's an example that extends GrailsAnnotationConfiguration and overrides all three SQL generation methods: package com.yourcompany.yourapp; import java.util.ArrayList; import java.util.List

Given these functional requirements: User Management Administrator Librarian Borrower *The users have the option of logging-in via OpenID. Property Management Book Memorandum Circular License Normally, I would implement these in Java as: interface User {} class Librarian implements User {} class Administrator implements User {} class Borrower implements User {} class OpenID {} //all Users HAS AN OpenID attribute (NULL if non-openId login) interface Property{} class Book implements Property{} class Memorandum implements Property{} class Circular implements Property{} class License implements