Hi I want to make a "Query" and put a filter for returning all pages that has "Show on a menu" checked. I did not find a way to do that.. Is it possible?
Try something like this:
using Orchard.Localization;
using Orchard.Projections.Descriptors.Filter;
using Orchard.Navigation;
using IFilterProvider = Orchard.Projections.Services.IFilterProvider;
namespace MyProject.Filters
{
public class MenuPartFilter : IFilterProvider {
public Localizer T { get; set; }
public ProductPartFilter() {
T = NullLocalizer.Instance;
}
public void Describe(DescribeFilterContext describe)
{
describe.For(
"Content", // The category of this filter
T("Content"), // The name of the filter (not used in 1.4)
T("Content")) // The description of the filter (not used in 1.4)
// Defines the actual filter (we could define multiple filters using the fluent syntax)
.Element(
"MenuParts", // Type of the element
T("Menu Parts"), // Name of the element
T("Menu parts"), // Description of the element
ApplyFilter, // Delegate to a method that performs the actual filtering for this element
DisplayFilter // Delegate to a method that returns a descriptive string for this element
);
}
private void ApplyFilter(FilterContext context) {
// Set the Query property of the context parameter to any IHqlQuery. In our case, we use a default query
// and narrow it down by joining with the MenuPartRecord.
context.Query = context.Query.Join(x => x.ContentPartRecord(typeof (MenuPartRecord)));
}
private LocalizedString DisplayFilter(FilterContext context) {
return T("Content with MenuPart");
}
}
}
Related
iam trying to map just a long field coming from my url route to create a Query Object from my controller, can i use auto mapper
CreateMap(MemberList.None);
Source :-long id
Destination:-
public class GetPlanQuery : IRequest<PlanDto>
{
public long Id { get; }
public GetPlanQuery(long id)
{
Id = id;
}
internal sealed class GetPlanQueryHandler : IRequestHandler<GetPlanQuery, PlanDto>
{
//Logic will go here
}
}
Map i am using is as below
CreateMap<long, GetPlanQuery>(MemberList.None);
i am getting an exception while executing as
System.ArgumentException:
needs to have a constructor with 0 args or only optional args.'
As Lucian correctly suggested you can achieve this kind of custom mapping by implementing ITypeConverter:
public class LongToGetPlanQueryTypeConverter : ITypeConverter<long, GetPlanQuery>
{
public GetPlanQuery Convert(long source, GetPlanQuery destination, ResolutionContext context)
{
return new GetPlanQuery(source);
}
}
then specify it's usage in AutoMapper configuration:
configuration.CreateMap<long, GetPlanQuery>()
.ConvertUsing<LongToGetPlanQueryTypeConverter>();
EDIT
Alternatively, you can just use a Func:
configuration.CreateMap<long, GetPlanQuery>()
.ConvertUsing(id => new GetPlanQuery(id));
Given I have the following setup (simplified version, removed logic to add to parent view and constraints etc).
public class TestViewModel : MvxViewModel
{
string _text;
public string Text
{
get => _text;
set
{
_text = value;
RaisePropertyChanged(() => Text);
}
}
}
public class TestViewController : MvxViewController<TestViewModel>
{
CustomViewA customViewA;
public TestViewController()
{
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
var bindingSet = this.CreateBindingSet<TestViewController, TestViewModel>();
bindingSet
.Bind(customViewA)
.For(v => v.Text)
.To(vm => vm.Text);
bindingSet.Apply();
}
}
public class CustomViewA : UIView
{
CustomViewB customViewB;
public string Text
{
get => customViewB.Text;
set => customViewB.Text = value;
}
}
public class CustomViewB : UIView
{
UITextField textField;
public string Text
{
get => textField.Text;
set => textField.Text = value;
}
}
Why is it that the bindings do not work? Only if I would make the UITextField in CustomViewB public and directly bind to it in the ViewController rather than the public property that directs to the Text property it seems to work. Like so:
bindingSet
.Bind(customViewA.customViewB.textField)
.For(v => v.Text)
.To(vm => vm.Text);
What am I missing here?
It depends on the requirements you have.
Binding in one direction should work (view model-to-view), I have tested your code and when the ViewModel property changes, the change is propagated to CustomViewA and from there to CusomViewB and finally to the UITextField.
However, the problem is with the opposite direction (view-to-view model). When the user updates the text field, its Text property changes. However, there is nothing notified about this change.
Although the property Text points to the text field, it is not "bound" to it, so when TextField's Text changes, the property itself doesn't know about it and neither does the MvvmCross binding.
In fact, MvvmCross binding in the control-to-view model direction is based on the ability to observe an event that tells the binding to check the new value of the bining source. This is already implemented for UITextField's Text, and it hooks up the EditingChanged event (see source code).
You can still make custom bindings work in the view-to-view model direction by implementing them manually. This is described in the documentation.
I'm new in the ASP.NET Framework, I've read the fundamental and have some understanding(theory) on the framework but not much in practice.
I'm struggling with the dropdownlistfor helper method, it comes down to having a weird behavior when i attempt to change the value of the selected item programatically.
In my controller i have the Index action method that receives a parameter of type Tshirt, inside this action method i set the property named Color of the Tshirt object with a value of 2.
In the view (strongly typed) i have a list of colors and pass this list as an argument for the constructor of the ColorViewModel class that will be in charge of returning SelectListItems for my list of colors.
In the view I then set the Selected property of my ColorViewModel object with the value coming from model.Color, now i have set everything so that when i call
#Html.DropDownListFor(x => x.Color, cvm.SelectItems, "Select a color")
I will have my dropdown displayed with the selected item.
When the request(GET) is performed the page is rendered by the browser and the dropdownlist appears with the correct value selected that was established with the value 2 in the Index action method, the dropdown displays "Blue" this is correct.
Then if i select a different item in the dropdownlist (RED, having an id of one) and submit the form, the Save action method is called and i know that the model is reaching the action method with a model.Color=1, which is correct.
Then i decide to redirect to the index action method passing the model object, the index action method changes the Color property back to 2, so when the page is rendered it should display again the value of Blue in the dropdown, but it doesn't, it displays Red.
if you comment out the following line in the Save action method you will get a different behavior.
//tshirt.Color = 3;
i know this logic im following doesnt make much sense from a bussines logic perspective, im just trying to understand what i am doing wrong to not get the expected result.
Given the following model
public class Color
{
public int Id { get; set; }
public string Description { get; set; }
}
I Create the following view model
public class ColorViewModel
{
public int Selected { get; set; }
private List<Color> Colors;
public IEnumerable<SelectListItem> SelectItems { get { return new SelectList(this.Colors, "Id", "Description", this.Selected); } }
private ColorViewModel() { }
public ColorViewModel(List<Color> colors)
{
this.Colors = colors;
}
}
This is my Controller
public class HomeController : Controller
{
[HttpGet()]
public ActionResult Index(Tshirt tshirt)
{
tshirt.Color = 2;
Tshirt t = new Tshirt();
t.Color = tshirt.Color;
return View(t);
}
[HttpPost()]
public ActionResult Save(Tshirt tshirt)
{
//tshirt.Color = 3;
return RedirectToAction("Index", tshirt);
//return View("Index",tshirt);
}
}
And Finally my View
#{
List<Color> colors = new List<Color>(){
new Color(){Id=1, Description="Red"},
new Color(){Id=2, Description="Blue"},
new Color(){Id=3, Description="Green"}
};
ColorViewModel cvm = new ColorViewModel(colors) { Selected = Model.Color };
}
#using(#Html.BeginForm("Save","Home")){
#Html.DropDownListFor(x => x.Color, cvm.SelectItems, "Select a color")
<input type="submit" />
}
I have uploaded the complete code: VS Solution
Because when you redirect, you are passing the updated model
return RedirectToAction("Index", tshirt);
I am creating a rule set engine that looks kinda like a unit test framework.
[RuleSet(ContextA)]
public class RuleSet1
{
[Rule(TargetingA)]
public Conclusion Rule1(SubjectA subject)
{ Create conclusion }
[Rule(TargetingA)]
public Conclusion Rule2(SubjectA subject)
{ Create conclusion }
[Rule(TargetingB)]
public Conclusion Rule3(SubjectB subject)
{ Create conclusion }
}
[RuleSet(ContextB)]
public class RuleSet2
{
[Rule(TargetingB)]
public Conclusion Rule1(SubjectB subject)
{ Create conclusion }
[Rule(TargetingA)]
public Conclusion Rule2(SubjectA subject)
{ Create conclusion }
[Rule(TargetingB)]
public Conclusion Rule3(SubjectB subject)
{ Create conclusion }
}
public class Conclusion()
{
// Errorcode, Description and such
}
// contexts and targeting info are enums.
The goal is to create an extensible ruleset that doesn't alter the API from consumer POV while having good separation-of-concerns within the code files. Again: like a unit test framework.
I am trying to create a library of these that expose the following API
public static class RuleEngine
{
public static IEnumerable<IRuleSet> RuleSets(contextFlags contexts)
{
{
return from type in Assembly.GetExecutingAssembly().GetTypes()
let attribute =
type.GetCustomAttributes(typeof (RuleSetAttribute), true)
.OfType<RuleSetAttribute>()
.FirstOrDefault()
where attribute != null
select ?? I don't know how to convert the individual methods to Func's.
}
}
}
internal interface IRuleset
{
IEnumerable<Func<SubjectA, Conclusion>> SubjectARules { get; }
IEnumerable<Func<SubjectB, Conclusion>> SubjectBRules { get; }
}
...which allows consumers to simply use like this (using foreach instead of LINQ for readability in this example)
foreach (var ruleset in RuleEgine.RuleSets(context))
{
foreach (var rule in ruleset.SubjectARules)
{
var conclusion = rule(myContextA);
//handle the conclusion
}
}
Also, it would be very helpful if you could tell me how to get rid of "TargetingA" and "TargetingB" as RuleAttribute parameters and instead use reflection to inspect the parameter type of the decorated method directly. All the while maintaining the same simple external API.
You can use Delegate.CreateDelegate and the GetParameters method to do what you want.
public class RuleSet : IRuleSet
{
public IEnumerable<Func<SubjectA, Conclusion>> SubjectARules { get; set; }
public IEnumerable<Func<SubjectB, Conclusion>> SubjectBRules { get; set; }
}
public static class RuleEngine
{
public static IEnumerable<IRuleSet> RuleSets() // removed contexts parameter for brevity
{
var result = from t in Assembly.GetExecutingAssembly().GetTypes()
where t.GetCustomAttributes(typeof(RuleSetAttribute), true).Any()
let m = t.GetMethods().Where(m => m.GetCustomAttributes(typeof(RuleAttribute)).Any()).ToArray()
select new RuleSet
{
SubjectARules = CreateFuncs<SubjectA>(m).ToList(),
SubjectBRules = CreateFuncs<SubjectB>(m).ToList()
};
return result;
}
}
// no error checking for brevity
// TODO: use better variable names
public static IEnumerable<Func<T, Conclusion>> CreateFuncs<T>(MethodInfo[] m)
{
return from x in m
where x.GetParameters()[0].ParameterType == typeof(T)
select (Func<T, Conclusion>)Delegate.CreateDelegate(typeof(Func<T, Conclusion>), null, x);
}
Then you can use it like this:
var sa = new SubjectA();
foreach (var ruleset in RuleEngine.RuleSets())
{
foreach (var rule in ruleset.SubjectARules)
{
var conclusion = rule(sa);
// do something with conclusion
}
}
In your LINQ query you headed straight for RuleSetAttribute, and so lost other information. If you break the query in several lines of code you can get methods from the type with GetMethods(), and then you can call GetCustomAttribute<RuleAttribute>().
I have a custom module. Migrations.cs looks like this.
public int Create()
{
SchemaBuilder.CreateTable("MyModuleRecord", table => table
.ContentPartRecord()
...
);
ContentDefinitionManager.AlterPartDefinition(
typeof(MyModulePart).Name, cfg => cfg.Attachable());
ContentDefinitionManager.AlterTypeDefinition("MyModule",
cfg => cfg
.WithPart("MyModulePart")
.WithPart("CommonPart")
.Creatable()
);
return 1;
}
This is the code I have in the controller.
var newcontent = _orchardServices.ContentManager.New<MyModulePart>("MyModule");
...
_orchardServices.ContentManager.Create(newcontent);
I get the invalid cast error from this New method in Orchard.ContentManagement ContentCreateExtensions.
public static T New<T>(this IContentManager manager, string contentType) where T : class, IContent {
var contentItem = manager.New(contentType);
if (contentItem == null)
return null;
var part = contentItem.Get<T>();
if (part == null)
throw new InvalidCastException();
return part;
}
Any idea what I am doing wrong?
Thanks.
This is the handler.
public class MyModuleHandler : ContentHandler
{
public MyModuleHandler(IRepository<MyModuleRecord> repository)
{
Filters.Add(StorageFilter.For(repository));
}
}
You are getting the InvalidCastException because the content item doesn't appear to have your MyModulePart attached.
If there were a driver for your part, then there is an implicit link somewhere that allows your part to be shown on a content item (I'm not sure how this is done, maybe someone else could elaborate - but it is something to do with how shapes are harvested and picked up by the shape table deep down in Orchard's core).
However since you don't have a driver, adding an ActivatingFilter to your part's handler class will make the link explicitly:
public MyModulePartHandler : ContentHandler {
public MyModulePartHandler() {
Filters.Add(StorageFilter.For(repository));
Filters.Add(new ActivatingFilter<MyModulePart>("MyModule");
}
}
Your part table name is wrong. Try renaming it to this (so the part before "Record" matches your part model name exactly):
SchemaBuilder.CreateTable("MyModulePartRecord", table => table
.ContentPartRecord()
...
);