gorm

问题 I have a Domain Class setup similar to this class NewsStory { String headline static hasMany = [channels:Channel] static mapping = { table 'NewsStory' addresses joinTable:[name:'Article_Channel', key:'ArticleId', column:'ChannelId'] } } in the Article_Channel table i need to have an extra column populated called ArticleType say. Its value will always be the same e.g. 'news' for this domain class, but will be differnt for others e.g. 'blog' Channel is just something like 'Security' etc Is

问题 I used the Grails create-script command to create my own custom script for rendering source code artifacts based on a GORM domain object. I want to generate a command object that contains the properties of the domain object. I see the properties and methods on the GroovyScriptCommand and TemplateRenderer, but I can't tell how to get a reference to the domain object properties or how to render them in my scaffolding templates. I tried forClass(model.fullName) but it says ClassNotFounException.

问题 In the following example, I'd expect Product.searchAll to match both additives and products, but it seems to ignore eq('name', taste) . class Additive { String flavor static belongsTo = [product:Product] } class Product { String name static hasMany = [additives:Additive] static constraints = { name nullable:true } static namedQueries = { searchAll { taste -> or { eq('name', taste) additives { eq('flavor', taste) } } } searchAdditives { taste -> additives { eq('flavor', taste) } }

问题 I have 3 domains with these relationships: A hasMany [bs: B] B belongsTo [c: C] C Inside a webflow I do this (simplified version): flow.a = new A(stuff:stuff) flow.a.addToBs(new B(c:C.get(1))) flow.a.addToBs(new B(c:C.get(2))) flow.a.addToBs(new B(c:C.get(3))) and then I try to show all this information on a gsp page: <g:each in="${a.bs}" var="b"> ${b.c.someProperty} </g:each> This is where I get LazyInitializationException . I think I understand why (webflow serializes flow scope) but when I

问题 Can I make this code shorter? if(count == null && from = null) { creditAdviceList = CreditAdvice.findAll { ilike('id', "%$idFilter%") ..... ilike('statusCode', statusCodeFilter) } } else if(count != null && from == null) { creditAdviceList = CreditAdvice.findAll(max: count) { ilike('id', "%$idFilter%") ..... ilike('statusCode', statusCodeFilter) } } else if(count == null && from != null) { creditAdviceList = CreditAdvice.findAll(offset: from) { ilike('id', "%$idFilter%") ..... ilike(

问题 I have a Note domain class, and when a new note is saved I need to create for it a NoteEvent , recording for posterity that the note has been created. Note has a collection of NoteEvents , and each NoteEvent keeps track of which Note it belongs to. The Note class: class Note { String noteText Date dateCreated static hasMany = [events : NoteEvent] } The NoteEvent class: class NoteEvent { Date dateCreated String type static belongsTo = [note : Note] } To handle the saving of new NoteEvents when

问题 In the GORM what is the difference between mappedBy and mapping ? static mapping = { ... } static mappedBy = { ... } 回答1: mapping mapping simply tells GORM to explicitly map one or more Domain properties to a specific database column. class Person { String firstName static mapping = { table 'people' id column: 'person_id' firstName column: 'First_Name' } } in this case for instance I am instructing GORM to map the id attribute to the column person_id of the people table and the firstName

问题 following is my code that is run on an api call.The below code is in a grails service which are transactional by default.But even after locking the row,I am getting this error : Message: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect) .There is just one plan in database so for loop is run just once.but there are concurrent calls to api which are causing error.Please help me fix this def updateAllPlans(def user,def percentComplete,def chapterId){ def

问题 So we are able to create different environment settings in the datasource.groovy file. And we can put common settings outside the environments node like so dataSource { pooled = false driverClassName = "org.h2.Driver" username = "sa" password = "" } environments { development { dataSource { dbCreate = "create-drop" url = "jdbc:h2:mem:devDb" } } test { dataSource { dbCreate = "update" url = "jdbc:h2:mem:testDb" } } production { dataSource { dbCreate = "update" url = "jdbc:h2:prodDb" } } } But

问题 In version 1.2, Grails introduced global constraints. I tried adding the following to Config.groovy grails.gorm.default = { constraints { notBlank(nullable:false, blank:false) } } Then using it in one of my domain classes static constraints = { email(email: true, unique: true, shared: 'notBlank') } But when I save a user with a null e-mail address, no errors are reported, why? Thanks, Don 回答1: I've never tried to make global constraints, but I can tell you that if you want to mark a field as