Based on a previous post and some suggestions received there I have modified my application to use the ajax dependency selection plugin for some chained select lists that I have.
The select lists are Consultant -> Contract -> Project
I have a create page and edit page for an evaluation that use the same form template. On the create page my chained selects are working correctly and saving to the database. However when I open up an existing evaluation only the select primary select box is populated. Do I need to do something special with this plugin to get the secondary select box values and lists populated as desired on the edit page?
Here is the code from my domain classes
Consultant domain class
class CdeConsultant {
String ccf_consultant_firm
static hasMany=[contracts:Contract]
static mapping = {
table name: 'cde_consultant'
version false
id column: 'ccf_consultant_id', generator: "assigned"
}
}
Here is the code for my contract domain class
class Contract {
String contractName
int conId
String phone
String projectManagerName
CdeConsultant cdeConsultant
static hasMany=[projectLists:ProjectList]
static mapping = {
table name: 'contract'
version false
id column: 'contracts_id', generator: "assigned"
}
}
Here is the code from my ProjectList domain class
class ProjectList {
String project
Contract contract
static mapping = {
table name: 'project_list'
version false
id column: 'dpp_project_phase_id', generator: "assigned"
contract column: 'contracts_id'
}
}
Here is my code for the evaluation class which is where these fields are being saved
import java.util.Date
class CdeEvaluation extends Base {
String consultant
String consultantName
String project
String projectManager
String projectManagerPhone
String evalStatus
String cdeComment
Date evalBeginDate
Date evalEndDate
String submitApproval
int workCategory
int contract
String contractName
List<CdeEvalQuestion> questions
static hasMany = [questions: CdeEvalQuestion]
static constraints = {
consultant(nullable:true)
consultantName(nullable:true)
project(nullable:true)
contract(nullable:true)
contractName(nullable:true)
projectManager(nullable:true)
projectManagerPhone(nullable:true)
evalStatus(nullable:true)
workCategory(nullable:true)
evalEndDate validator: {value, cdeEvaluation -> value >= cdeEvaluation.evalBeginDate}
cdeComment(nullable:true, maxSize:2000)
submitApproval(nullable:true)
evalBeginDate(blank: false, nullable:true)
evalEndDate(blank: false, nullable:true)
createdBy(blank: false, nullable:true, maxSize:13)
dateCreated(blank: false, nullable:true)
lastUpdatedBy(blank: false, nullable:true, maxSize:13)
lastUpdated(blank: false, nullable:true)
}
static mapping = {
table name: 'CDE_EVALUATION'
id column: 'ceval_id_seq'
id generator: 'sequence', params: [sequence: 'ceval_id_seq']
}
#Override
public String toString() {
"${project}"
}
class EvaluationController {
static scaffold=true
}
}
And finally here is the code for my form template that is used in both the create and edit pages.
<g:selectPrimary class="form-select-list" id="consultant" name="consultant" label="Consultant"
domain='gov.mt.mdt.cde.domain.evaluation.CdeConsultant'
searchField="ccf_consultant_firm"
collectField='id'
domain2='gov.mt.mdt.cde.domain.evaluation.Contract'
bindid="cdeConsultant.id"
searchField2='contractName'
collectField2='id'
noSelection="['': 'Select A Consultant']"
setId="contract"
value="${cdeEvaluationInstance?.consultant}"
appendValue=''
appendName='Select a Contract' />
<g:selectSecondary class="form-select-list" id="contract" name="contract"
domain2='gov.mt.mdt.cde.domain.evaluation.ProjectList'
bindid="contract.id"
searchField2='project'
collectField2='project'
noSelection="['': 'Select A Contract']"
setId="project"
appendValue=''
appendName='Select a Project'
value="${cdeEvaluationInstance?.contract}"
required="false"/>
<g:select class="form-control" name="project" id="project" optionKey="project" optionValue="project"
from="[]" noSelection="['': 'Select A Project']" value="${cdeEvaluationInstance?.project}" />
Sorry a little late to answer your question here, edit I don't think has much documentation :). Although current situation gives me ideas to expand on the plugin for sure...
The problem being the secondary selection is reliant on primary being selected, the selection on primary itself triggers the gathered list for secondary box to be populated. Since primary is already defined not selected - well there you see the issue.
Let me have a think, if you had raised it as issue/suggestion on github I would have got to it earlier.
UPDATE
Ok I have rolled out 0.40 which should hopefully address edit mode :
Please take a look at this page :
https://github.com/vahidhedayati/ajaxdependancyselectexample/blob/master/grails-app/views/myContinent/testedit.gsp
In theory assuming the hardcoded values are returned as dynamic variables from the db an additional definition is required per primary/secondary call:
so in the
value='4'
secondaryValue='10'
Value is its own value and secondaryValue is what you expect to set the next selectSecondary
Please note I had to also remove appendName and appendValue from selectPrimary/selectSecondary calls. I think there was some form of a conflict in the edit mode....
Anyhow that testedit appeared to be working.
Related
I try to validate a nested domain class instance on a command object.
Having the following command object
package demo
import grails.databinding.BindingFormat
class SaveEventCommand {
#BindingFormat('yyyy-MM-dd')
Date date
Refreshment refreshment
static constraints = {
date validator: { date -> date > new Date() + 3}
refreshment nullable: true
}
}
And having the following domain class with its own constraints
package demo
class Refreshment {
String food
String drink
Integer quantity
static constraints = {
food inList: ['food1', 'food2', 'food3']
drink nullable: true, inList: ['drink1', 'drink2', 'drink3']
quantity: min: 1
}
}
I need when refreshment is not nullable the command object validates the date property and check the corresponding restrictions in refreshment instance
For now try with this code in the controller:
def save(SaveEventCommand command) {
if (command.hasErrors() || !command.refreshment.validate()) {
respond ([errors: command.errors], view: 'create')
return
}
// Store logic goes here
}
Here through !command.refreshment.validate() I try to validate the refresh instance but I get the result that there are no errors, even when passing data that is not correct.
Thank you any guide and thank you for your time
I typically just include some code that will use a custom validator to kick off validation for any property that is composed of another command object. For example:
thePropertyInQuestion(nullable: true, validator: {val, obj, err ->
if (val == null) return
if (!val.validate()) {
val.errors.allErrors.each { e ->
err.rejectValue(
"thePropertyInQuestion.${e.arguments[0]}",
"${e.objectName}.${e.arguments[0]}.${e.code}",
e.arguments,
"${e.objectName}.${e.arguments[0]}.${e.code}"
)
}
}
})
This way it's pretty clear that I want validation to occur. Plus it moves all the errors up into the root errors collection which makes things super easy for me.
Two things I could think of:
Implement grails.validation.Validateable on your command object
What happens when you provide an invalid date? Can you see errors while validating?
I'm having a validation issue very similar to what is described here
https://schneide.wordpress.com/2010/09/20/gorm-gotchas-validation-and-hasmany/
but with an important difference that I don't have (or want) a List<Element> elements field in my domain. My code is
class Location {
static hasMany = [pocs: LocationPoc]
Integer id
String address
String city
State state
String zip
...
static mapping = {
...
}
static constraints = {
def regEx = new RegEx()
address blank: true, nullable: true, matches: regEx.VALID_ADDRESS_REGEX
city blank: true, nullable: true
state blank: true, nullable: true
zip blank: true, nullable: true
...
}
}
however, if I save/update a location with a bunk POC (point of contact), I get some wild errors. I would like to validate the POC's when I save/update a location, but I'm not exactly sure how. I've tried a few variations of
pocs validator: {
obj -> obj?.pocs?.each {
if (!it.validate()) {
return false
}
}
return true
}
to no avail. Is this possbile without creating a new field on my domain, List<LocationPoc> pocs?
You're close. The issue is you need to target the property you want to validate instead of using the object reference. It should look like this:
pocs validator: { val, obj, err ->
val?.each {
if (!it.validate()) return false
}
}
Validation doesn't automatically cascade through hasMany associations. In order to get free validation, the other side of the relationship needs to belong to Location.
You didn't include your LocationPOC class, but if you modify
Location location
to
static belongsTo = [location: Location]
Then you will get cascading validation when you save your Location object.
If you can't set the belongsTo property on LocationPoc, and need to use the custom validator, the syntax is a bit different than the answer above.
pocs validator: {val, obj ->
val?.inject true, {acc,item -> acc && item.validate()}
}
the three arguement version of validate expects you to add errors to the errorCollection. https://grails.github.io/grails2-doc/2.5.6/ref/Constraints/validator.html
Plus using a return statement inside of .each doesn't work like the above example. It just exits the closure and starts the next iteration. The validator from the other answer was just returning val (the result of val.each is just val)
You need to spin through the entire collection looking for non valid options.
Using Orchard CMS, I am dealing with a record and a part proxy, but cannot figure out how to save it into the DB. In fact, I confess I don't even know how to get the items I'm trying to save into this paradigm. I was originally using enum's for choices:
MyEmum.cs:
public enum Choices { Choice1, Choice2, Choice3, Choice4 }
MyRecord.cs:
public virtual string MyProperty { get; set; }
MyPart.cs:
public IEnumerable<string> MyProperty
{
get
{
if (String.IsNullOrWhiteSpace(Record.MyProperty)) return new string[] { };
return Record
.MyProperty
.Split(new[] { '.' }, StringSplitOptions.RemoveEmptyEntries)
.Select(r => r.Trim())
.Where(r => !String.IsNullOrEmpty(r));
}
set { Record.MyProperty = value == null ? null : String.Join(",", value); }
}
Now, in my service class, I tried something like:
public MyPart Create(MyPartRecord record)
{
MyPart part = Services.ContentManager.Create<MyPart>("My");
...
part.MyProperty = record.MyProperty; //getting error here
...
return part;
}
However, I am getting the following error: Cannot implicitly convert 'string' to System.Collections.Generic.IEnumerable<string>'
Essentially, I am trying to save choices from a checkboxlist (one or more selections) as a comma-separated list in the DB.
And this doesn't even get me over the problem of how do I use the enum. Any thoughts?
For some background:
I understand that the appropriate way to handle this relationship would be to create a separate table and use IList<MyEnum>. However, this is a simple list that I do not intend to manipulate with edits (in fact, no driver is used in this scenario as I handle this on the front-end with a controller and routes). I am just capturing data and redisplaying it in the Admin view for statistical/historical purposes. I may even consider getting rid of the Part (considering the following post: Bertrand's Blog Post.
It should be:
part.MyProperty = new[] {"foo", "bar"};
for example. The part's setter will store the value on the record's property as a comma-separated string, which will get persisted into the DB.
If you want to use enum values, you should use the Parse and ToString APIs that .NET provide on Enum.
I've only been using fluent nhibernate a few days and its been going fine until trying to deal with guid values and Oracle. I have read a good few posts on the subject but none that help me solve the problem I am seeing.
I am using Oracle 10g express edition.
I have a simple test table in oracle
CREATE TABLE test (Field RAW(16));
I have a simple class and interface for mapping to the table
public class Test : ITest
{
public virtual Guid Field { get; set; }
}
public interface ITest
{
Guid Field { get; set; }
}
Class map is simple
public class TestMap : ClassMap<Test>
{
public TestMap()
{
Id(x => x.Field);
}
}
I start trying to insert a simple easily recognised guid value
00112233445566778899AABBCCDDEEFF
Heres the code
var test = new Test {Field = new Guid("00112233445566778899AABBCCDDEEFF")};
// test.Field == 00112233445566778899AABBCCDDEEFF here.
session.Save(test);
// after save guid is changed, test.Field == 09a3f4eefebc4cdb8c239f5300edfd82
// this value is different for each run so I pressume nhibernate is assigning
// a value internally.
transaction.Commit();
IQuery query = session.CreateQuery("from Test");
// or
// IQuery query = session.CreateSQLQuery("select * from Test").AddEntity(typeof(Test));
var t in query.List<Test>().Single();
// t.Field == 8ef8a3b10e704e4dae5d9f5300e77098
// this value never changes between runs.
The value actually stored in the database differs each time also, for the run above it was
EEF4A309BCFEDB4C8C239F5300EDFD82
Truly confused....
Any help much appreciated.
EDIT: I always delete data from the table before each test run. Also using ADO directly works no problem.
EDIT: OK, my first problem was that even though I thought I was dropping the data from the table via SQL command line for oracle when I viewed the table via oracle UI it still had data and the first guid was as I should have expected 8ef8a3b10e704e4dae5d9f5300e77098.
Fnhibernate still appears to be altering the guid value on save. it alters it to the value it stores in the database but I'm still not sure why it is doing this or how\if I can control it.
If you intend on assigning the id yourself you will need to use a different id generator than the default which is Guid.comb. You should be using assigned instead. So your mapping would look something like this:
Id(x => x.Field).GeneratedBy.Assigned();
You can read more about id generators in the nhibernate documentation here:
http://www.nhforge.org/doc/nh/en/index.html#mapping-declaration-id-generator
I have two tables in my database connected by foreign keys: Page (PageId, other data) and PageTag (PageId, Tag). I've used LINQ to generate classes for these tables, with the page as the parent and the Tag as the child collection (one to many relationship). Is there any way to mark PageTag records for deletion from the database from within the Page class?
Quick Clearification:
I want the child objects to be deleted when the parent DataContext calls SubmitChanges(), not before. I want TagString to behave exactly like any of the other properties of the Page object.
I would like to enable code like the following:
Page page = mDataContext.Pages.Where(page => page.pageId = 1);
page.TagString = "new set of tags";
//Changes have not been written to the database at this point.
mDataContext.SubmitChanges();
//All changes should now be saved to the database.
Here is my situation in detail:
In order to make working with the collection of tags easier, I've added a property to the Page object that treats the Tag collection as a string:
public string TagString {
get {
StringBuilder output = new StringBuilder();
foreach (PageTag tag in PageTags) {
output.Append(tag.Tag + " ");
}
if (output.Length > 0) {
output.Remove(output.Length - 1, 1);
}
return output.ToString();
}
set {
string[] tags = value.Split(' ');
PageTags.Clear();
foreach (string tag in tags) {
PageTag pageTag = new PageTag();
pageTag.Tag = tag;
PageTags.Add(pageTag);
}
}
}
Basically, the idea is that when a string of tags is sent to this property, the current tags of the object are deleted and a new set is generated in their place.
The problem I'm encountering is that this line:
PageTags.Clear();
Doesn't actually delete the old tags from the database when changes are submitted.
Looking around, the "proper" way to delete things seems to be to call the DeleteOnSubmit method of the data context class. But I don't appear to have access to the DataContext class from within the Page class.
Does anyone know of a way to mark the child elements for deletion from the database from within the Page class?
After some more research, I believe I've managed to find a solution. Marking an object for deletion when it's removed from a collection is controlled by the DeleteOnNull parameter of the Association attribute.
This parameter is set to true when the relationship between two tables is marked with OnDelete Cascade.
Unfortunately, there is no way to set this attribute from within the designer, and no way to set it from within the partial class in the *DataContext.cs file. The only way to set it without enabling cascading deletes is to manually edit the *DataContext.designer.cs file.
In my case, this meant finding the Page association, and adding the DeleteOnNull property:
[Association(Name="Page_PageTag", Storage="_Page", ThisKey="PageId", OtherKey="iPageId", IsForeignKey=true)]
public Page Page
{
...
}
And adding the DeleteOnNull attribute:
[Association(Name="Page_PageTag", Storage="_Page", ThisKey="PageId", OtherKey="iPageId", IsForeignKey=true, DeleteOnNull = true)]
public Page Page
{
...
}
Note that the attribute needed to be added to the Page property of the PageTag class, not the other way around.
See also:
Beth Massi -- LINQ to SQL and One-To-Many Relationships
Dave Brace -- LINQ to SQL: DeleteOnNull
Sorry, my bad. That won't work.
It really looks like you need to be doing this in your repository, rather than in your Page class. There, you have access to your original data context.
There is a way to "attach" the original data context, but by the time you do that, it has become quite the code smell.
Do you have a relationship, in your Linq to SQL entity diagram, linking the Page and PageTags tables? If you don't, that is why you can't see the PageTags class from the Page class.
If the foreign key in the PageTags database table is set to Allow Nulls, Linq to SQL will not create the link when you drag the tables into the designer, even if you created a relationship on the SQL Server.
This is one of those areas where OR mapping can get kind of hairy. Providing this TagString property makes things a bit more convenient, but in the long run it obfuscates what is really happening when someone utilizes the TagString property. By hiding the fact that your performing data modification, someone can very easily come along and set the TagString without using your Page entity within the scope of a DataContext, which could lead to some difficult to find bugs.
A better solution would be to add a Tags property on the Page class with the L2S model designer, and require that the PageTags be edited directly on the Tags property, within the scope of a DataContext. Make the TagString property read only, so it can be genreated (and still provide some convenience), but eliminate the confusion and difficulty around setting that property. This kind of change clarifies intent, and makes it obvious what is happening and what is required by consumers of the Page object to make it happen.
Since Tags is a property of your Page object, as long as it is attached to a DataContext, any changes to that collection will properly trigger deletions or insertions in the database in response to Remove or Add calls.
Aaron,
Apparently you have to loop thru your PageTag records, calling DeleteOnSubmit for each one. Linq to SQL should create an aggregate query to delete all of the records at once when you call SubmitChanges, so overhead should be minimal.
replace
PageTags.Clear();
with
foreach (PageTag tag in PageTags)
myDataContext.DeleteOnSubmit(tag);
Aaron:
Add a DataContext member to your PageTag partial class.
partial class PageTag
{
DataClassesDataContext myDataContext = new DataClassesDataContext();
public string TagString {
..etc.
Larger code sample posted at Robert Harvey's request:
DataContext.cs file:
namespace MyProject.Library.Model
{
using Tome.Library.Parsing;
using System.Text;
partial class Page
{
//Part of Robert Harvey's proposed solution.
MyDataContext mDataContext = new TomeDataContext();
public string TagString {
get {
StringBuilder output = new StringBuilder();
foreach (PageTag tag in PageTags) {
output.Append(tag.Tag + " ");
}
if (output.Length > 0) {
output.Remove(output.Length - 1, 1);
}
return output.ToString();
}
set {
string[] tags = value.Split(' ');
//Original code, fails to mark for deletion.
//PageTags.Clear();
//Robert Harvey's suggestion, thorws exception "Cannot remove an entity that has not been attached."
foreach (PageTag tag in PageTags) {
mDataContext.PageTags.DeleteOnSubmit(tag);
}
foreach (string tag in tags) {
PageTag PageTag = new PageTag();
PageTag.Tag = tag;
PageTags.Add(PageTag);
}
}
}
private bool mIsNew;
public bool IsNew {
get {
return mIsNew;
}
}
partial void OnCreated() {
mIsNew = true;
}
partial void OnLoaded() {
mIsNew = false;
}
}
}
Repository Methods:
public void Save() {
mDataContext.SubmitChanges();
}
public Page GetPage(string pageName) {
Page page =
(from p in mDataContext.Pages
where p.FileName == pageName
select p).SingleOrDefault();
return page;
}
Usage:
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult Edit(string pageName, FormCollection formValues) {
Page updatedPage = mRepository.GetPage(pageName);
//TagString is a Form value, and is set via UpdateModel.
UpdateModel(updatedPage, formValues.ToValueProvider());
updatedPage.FileName = pageName;
//At this point NO changes should have been written to the database.
mRepository.Save();
//All changes should NOW be saved to the database.
return RedirectToAction("Index", "Pages", new { PageName = pageName });
}