I was under the wrong impression of saving enum type as ordinal values after completion of the issue https://jira.grails.org/browse/GPMONGODB-232 that we can now save enum with the custom id.
For example:
This won't save field type with values either 2 or 3.
package test
class User {
static mapping = {
//type enumType: "ordinal"
}
UserType type
String name
}
enum UserType {
A(2),
B(3),
int getId() {
this.id
}
final int id
UserType(int id) {
this.id = id
}
}
How can we save enum with custom ids (as shown above) in a grails app with mongodb plugin installed?
I haven't checked Grails 2.4 yet, but in 2.3.8 (or at least in grails-datastore-core 3.1.0) you can't.
The issue that you referenced referred to the using built-in ordinal value of the Enum class, not a property value. What you want is a custom type marshaller (or perhaps the subclass AbstractMappingAwareCustomTypeMarshaller). Unfortunately, Grails checks to see if a property is an enum before considering a custom type mapper. From org.grails.datastore.mapping.model.config.GormMappingConfigurationStrategy#getPersistentProperties():
else if (Enum.class.isAssignableFrom(currentPropType) ||
propertyFactory.isSimpleType(propertyType)) {
persistentProperties.add(propertyFactory.createSimple(entity, context, descriptor));
}
else if (MappingFactory.isCustomType(propertyType)) {
persistentProperties.add(propertyFactory.createCustom(entity, context, descriptor));
}
I'd say that this is a bug and if it is still present in 2.4.4 (or whatever the latest version currently is) then it should be reported to Grails.
Answering my own question in case anyone need this feature. Now mongodb also supports saving enum with custom id as explained in the question.
The changes required are already merged by pull request https://github.com/grails/grails-data-mapping/pull/41 and they just have to release a new version of mongodb or GORM.
Related
I'm using the web-micro profile from Grails 3.x to write microservices. I need to be able to search on one of the fields. I believe in previous versions of grails, you could add the fields to the query string.
http://localhost:3141/zipcode?zip=55509 would return just the zipcode object(s) that had that value for zip.
This does not seem to work in Grails 3.x web-micro.
#Entity
#Resource(uri="/zipcode")
class ZipCode {
static belongsTo = [kingdomGroup : KingdomGroup]
String zip
static constraints = {
}
String toString() { zip }
}
Confirm that kingdomGroup is initialized properly?
secondly, confirm the datasource that you're using, and that it has data as expected.
So I decided to use AjaxDependencySelection Plugin for Grails, and it has proven to be very useful. However, I am trying to implement autoComplete boxes, and it does not seem to be saving the object id when using an Autocompleted selection. Here is my implementation in my gsp
<g:selectPrimary id="template" name="template"
domain='dms.nexusglobal.Template'
searchField='templateName'
collectField='id'
domain2='dms.nexusglobal.Tag'
bindid="template.id"
searchField2='tagName'
collectField2='id'
hidden="hiddenNew"
noSelection="['': 'Please choose Template']"
setId="tag"
value="${documentPartInstance?.template}"/>
<g:selectSecondary id="tag" name="tag"
domain2='dms.nexusglobal.Subtag'
bindid="tag.id"
searchField2='subtagName'
collectField2='id'
autocomp="1"
noSelection="['': 'Please choose Tag']"
setId="subtag"
value="${documentPartInstance?.tag}"/>
<g:autoCompleteSecondary id="subtag" name="subtagId"
domain='dms.nexusglobal.Subtag'
primarybind='tag.id'
hidden='tag'
hidden2='hidden5'
searchField='subtagName'
collectField='id'
value='${documentPartInstance?.subtag}'/>
<input type=hidden id="hidden5" name="subtagId" value="${documentPartInstance?.subtag}"/>
However, everytime I save it, I am presented with this error Column 'subtag_id' cannot be null . Here is my domain class definition for Subtag
class Subtag {
static scaffold = true
String subtagName
static belongsTo = [tag : Tag]
public Subtag()
{
}
public Subtag(String s)
{
subtagName = s
}
static constraints = {
}
String toString(){
subtagName
}
}
Tag hasMany subtags as well
It seems to be creating new Subtag instances when using the autoselect box (as an error shows up saying Could not find matching constructor for:packagename.Subtag(java.lang.String) Although this is a feature I am looking to implement in my application at later stages (being able to create new Subtags on the fly when creating a document Part), right now, all I would like to be able to do is just choose from my already existing subtags.
When I add in a string constructor, it comes back with the error that Column subtag_id cannot be null
I have developed it so will try help you through your issue.
The problem is that you are trying to push a value from selectSecondary and update the elementId of g:autocomplete which is actually a seperate entity.
I will update the plugin with a new method, need to test it out first.. Also take a look at g:selectAutoComplete. Although this method would only work if your secondary was the primary task... so no good in that case either..
hang on and look out for 0.37 release
Released 0.37 documentation on how to do such a thing here: https://github.com/vahidhedayati/ajaxdependancyselection/wiki/from-selection-to-autocomplete---how-to
I've noticed that in the metadata there's an object entityType but also an object enumType.
We use manager.metadataStore.getEntityType() to access the metadata of an Entity.
How can we do it for a given enum ? How would I create the enum on the client side out of the metadata ?
Also, when I assign an enum value to a property, I'd like to to it by name instead of by value.
For instance, assuming that Status is of type myEnum:
myEntity.Status = myEnum.Valid;
instead of
myEntity.Status = 1;
Does breeze have any helper function to access the values of an enum ?
This issue is still open as I write. But you might want to take a look at the work-around described in the answer to this SO question.
I am assuming that you are talking about data properties that are defined as .NET enums on the server, and you want additional metadata about these properties to be made available on the Breeze client.
Unfortunately, Breeze does not yet support any metadata on enum types other than the name of the .NET type backing the enum value. This is the 'enumType' property that will appear on any dataProperty that is backed by an .NET Enum on the server. (We do need to document this better)
Please add a feature request for this to the Breeze User Voice. It's a good idea and we do take these suggestions very seriously.
Well this is not exact solution to your question but definitely can help people who are generating metadata offline.
I am using NancyFx(No EF) + Breeze + AngularJS for my web project and generating breeze metadata offline(using EF methods at development) and then using it in js file.
I also encountered similar situation where I want to get all Enum values to bind dropdowns and to display EnumName corresponding to EnumValue(Id). I searched over net but there was not much as per my scenario.
So I have written raw JS methods
1. To extract all enums and their values(Id & Name) in a JS dictionary(associated array) from metadata.
var enumDictionary = {};
JSON.parse(window.app.metadata).schema.enumType.forEach(function (enumType) {
var newEnumValues = [];
enumType.member.forEach(function (enumValue) {
var newEnumValue = { id: enumValue.value, name: enumValue.name };
newEnumValues.push(newEnumValue);
});
enumDictionary[enumType.name] = newEnumValues;
});
I created a method to get all enum values for a specific enum. This will be used for binding a dropdown.
function GetEnumDictionary(enumName) {
return enumDictionary[enumName];
}
Another method I created to get specific Enum name on basis of value.
function GetEnumDictionaryValue(enumName, enumValueId) {
var result = null;
enumDictionary[enumName].some(function (enumValue) {
if (enumValue.id == enumValueId) {
result = enumValue.name;
return;
}
});
return result;
}
I tried to change the standard 'id' in grails:
calls Book {
String id
String title
static mapping {
id generator:'assigned'
}
}
unfortunately, I soon noticed that this breaks my bootstrap. Instead of
new Book (id:'some ISBN', title:'great book').save(flush:true, failOnError:true)
I had to use
def b = new Book(title:'great book')
b.id = 'some ISBN'
b.save(flush:true, failOnError:true)
otherwise I get an 'ids for this class must be manually assigned before calling save()' error.
but that's ok so far.
I then encountered the same problem in the save action of my bookController. But this time, the workaround didn't do the trick.
Any suggestions?
I known, I can rename the id, but then I will have to change all scaffolded views...
That's a feature of databinding. You don't want submitted data to be able to change managed fields like id and version, so the Map constructor that you're using binds all available properties except those two (it also ignores any value for class, metaClass, and a few others).
So there's a bit of a mismatch here since the value isn't managed by Hibernate/GORM but by you. As you saw the workaround is that you need to create the object in two steps instead of just one.
I can't replicate this problem (used Grails 2.0.RC1). I think it might be as simple as a missing equal sign on your static mapping = { (you just have static mapping {)
Here's the code for a domain object:
class Book {
String id
String name
static mapping = {
id generator:'assigned'
}
}
And inside BootStrap.groovy:
def init = { servletContext ->
new Book(name:"test",id:"123abc").save(failOnError:true)
}
And it works fine for me. I see the id as 123abc.
You need to set the bindable constraint to true for your id prop, e.g.
class Employee {
Long id
String name
static constraints = {
id bindable: true
}
}
I have such domain classes:
class ServicesGroup {
Long id
String name
String description
String toString(){
return name
}
static mapping = {
version false
table 'root.services_groups'
id column:'group_id'
name column:'group_name'
description column:'group_desc'
}
}
and
class Step {
Long id
ServicesGroup service
String stepType
Integer stepFrom
Integer stepTo
static constraints = {
stepType(inList:['operator', 'client'])
}
static mapping = {
version false
table 'bill.steps'
service column:'service_group_id'
}
}
The relationship is - one ServicesGroup entry can have multiple Step instances.
However, when in my controller I try to
Step.findByService(3)
I get:
"org.codehaus.groovy.runtime.InvokerInvocationException: groovy.lang.MissingMethodException: No signature of method: Step.findByService() is applicable for argument types: (java.lang.Integer) values: {3}"
However, when I change Step domain class field
ServicesGroup service
to simply
Long service
it works.
What's going on here?
Try it that way:
Step.findByService(ServicesGroup.get(3))
Try
grails clean
grails run-app
Then try again.
Something like Step.findByService([id: 3]) may work. It only cares about the ID anyway for the purposes of the SQL generation. In a lot of cases like this you can toss a fake map into there rather than the real thing, and save yourself some performance.
On the other hand, the abstraction breaks down a bit when you do this.