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  • silverlight adding single prism command delegate to a list of items in xaml

    - by bobwah
    I'm building a menu using Prism (using a trtelerik tree view with hierarchy data templates but hopefully the details don't matter) and I'm trying to set up a Click.Command on each menu items bindings that will all call the same delegate command which is defined in the view model. The menu is built up out of items which I don't really want to put any references to the command in. How do I bind the command to each of these items in xaml? I've looked around and it looks like in WPF I could use a relative source binding and find ancestors but there doesn't seem to be a way of doing this in silverlight. Can I setup the delegate as a static resource somehow? I don't think I can create a static resource to the view model as this uses Unity to resolve paramters to it's constructor.

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  • Marionette js itemview not defined: then on browser refresh it is defined and all works well - race condition?

    - by Robert
    Yeah it's just the initial browser load or two after a cache clear. Subsequent refreshes clear the problem up. I'm thinking the item views just aren't fully constructed in time to be used in the collection views on the first load. But then they are on a refresh? Don't know. There must be something about the code sequence or loading or the load time itself. Not sure. I'm loading via require.js. Have two collections - users and messages. Each renders in its own list view. Each works, just not the first time or two the browser loads. The first time you load after clearing browser cache the console reports, for instance: "Uncaught ReferenceError: MessageItemView is not defined" A simple browser refresh clears it up. Same goes for the user collection. It's collection view says it doesn't know anything about its item view. But a simple browser refresh and all is well. My views (item and collection) are in separate files. Is that the problem? For instance, here is my message collection view in its own file: messagelistview.js var MessageListView = Marionette.CollectionView.extend({ itemView: MessageItemView, el: $("#messages") }); And the message item view is in a separate file: messageview.js var MessageItemView = Marionette.ItemView.extend({ tagName: "div", template: Handlebars.compile( '<div>{{fromUserName}}:</div>' + '<div>{{message}}</div>' + ) }); Then in my main module file, which references each of those files, the collection view is constructed and displayed: main.js //Define a model MessageModel = Backbone.Model.extend(); //Make an instance of MessageItemView - code in separate file, messagelistview.js MessageView = new MessageItemView(); //Define a message collection var MessageCollection = Backbone.Collection.extend({ model: MessageModel }); //Make an instance of MessageCollection var collMessages = new MessageCollection(); //Make an instance of a MessageListView - code in separate file, messagelistview.js var messageListView = new MessageListView({ collection: collMessages }); App.messageListRegion.show(messageListView); Do I just have things sequenced wrong? I'm thinking it's some kind of race condition only because over 3G to an iPad the item views are always undefined. They never seem to get constructed in time. PC on a hard wired connection does see success after a browser refresh or two.

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  • Rails - inheritance hierarchy of classes where an subtipe can play two roles

    - by Miquel
    I need to model Owners and Rentees in an application, so you have stuff that is always owned by someone and can be rented for someone else. I first approached this problem with Single Table Inheritance because both types of person will share all attributes, so you would have a model called Person associated to a table people with Owner and Rentee inheriting from Person. The problem is that Single type inheritance discerns subtypes using a field type and therefore a record in the table can represent either an Owner or a Rentee but not both at the same time, while in the real context you can have an Owner which is renting something from another Owner and therefore that person is at the same time an Owner and a Rentee. How would you approach this problem? Would you use separated tables fro owners and rentees? Is there any other type of table inheritance in Rails?

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  • Rails authorization plugins

    - by jacklin
    We are evaluating plugins for Authorization in Rails. The two at the top of our list are cancan and declarative_authorization. I would like to get some feedback from anyone currently using either of these plugins. The problem we are going to face with any authorization plugin is that we have a database per customer model and will need to modify the plugin to work within that model. Because of this fact I'm interested in hearing from anyone who has had to tweak the plugins at all as well. I'm just starting to look around at the code. It seems like cancan might be a little easier to customize. Any thoughts?

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  • Use multiple inheritance to discriminate useage roles?

    - by Arne
    Hi fellows, it's my flight simulation application again. I am leaving the mere prototyping phase now and start fleshing out the software design now. At least I try.. Each of the aircraft in the simulation have got a flight plan associated to them, the exact nature of which is of no interest for this question. Sufficient to say that the operator way edit the flight plan while the simulation is running. The aircraft model most of the time only needs to read-acess the flight plan object which at first thought calls for simply passing a const reference. But ocassionally the aircraft will need to call AdvanceActiveWayPoint() to indicate a way point has been reached. This will affect the Iterator returned by function ActiveWayPoint(). This implies that the aircraft model indeed needs a non-const reference which in turn would also expose functions like AppendWayPoint() to the aircraft model. I would like to avoid this because I would like to enforce the useage rule described above at compile time. Note that class WayPointIter is equivalent to a STL const iterator, that is the way point can not be mutated by the iterator. class FlightPlan { public: void AppendWayPoint(const WayPointIter& at, WayPoint new_wp); void ReplaceWayPoint(const WayPointIter& ar, WayPoint new_wp); void RemoveWayPoint(WayPointIter at); (...) WayPointIter First() const; WayPointIter Last() const; WayPointIter Active() const; void AdvanceActiveWayPoint() const; (...) }; My idea to overcome the issue is this: define an abstract interface class for each usage role and inherit FlightPlan from both. Each user then only gets passed a reference of the appropriate useage role. class IFlightPlanActiveWayPoint { public: WayPointIter Active() const =0; void AdvanceActiveWayPoint() const =0; }; class IFlightPlanEditable { public: void AppendWayPoint(const WayPointIter& at, WayPoint new_wp); void ReplaceWayPoint(const WayPointIter& ar, WayPoint new_wp); void RemoveWayPoint(WayPointIter at); (...) }; Thus the declaration of FlightPlan would only need to be changed to: class FlightPlan : public IFlightPlanActiveWayPoint, IFlightPlanEditable { (...) }; What do you think? Are there any cavecats I might be missing? Is this design clear or should I come up with somethink different for the sake of clarity? Alternatively I could also define a special ActiveWayPoint class which would contain the function AdvanceActiveWayPoint() but feel that this might be unnecessary. Thanks in advance!

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  • Hibernate Annotation (Pyramid Structure - same table)

    - by fatnjazzy
    Hi, I have a person table that contains the following fields: id, name, parent_id. the parent_id is actually a FK for column id. the data should look like this (Like a pyramid): "id" "name" "parent_id" "1" "I am the Top Father" "1" "2" "My Father Is 1" "1" "3" "My Father Is 2" "2" "4" "My Father Is 2" "2" How is my bean suppose to look like? Thanks

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  • ASP.NET GridView throwing error: "Update is disabled for this control".

    - by NTDLS
    I have the absolutely most simple setup imaginable. A single table defined in an Entity model in ASP.net v4, the model is bound directly to a GridView with AutoGenerateEditButton enabled. However, each time I hit edit, then save, the page throws the error “Update is disabled for this control" for which I cannot find a solution. What is causing this error? What can do to resolve it? <% <asp:GridView ID="MenuItemsGrid" runat="server" DataSourceID="gridDataSource" AutoGenerateEditButton="true" AutoGenerateColumns="true"> </asp:GridView> <asp:EntityDataSource ID="gridDataSource" runat="server" ConnectionString="name=dataEntitiesModel" DefaultContainerName="dataEntities" EntitySetName="MenuItems" /> %>

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  • No Parameterless Constructor defined for - ViewModel with UOW

    - by TheVillageIdiot
    I have a view model class which uses UnitOfWork to some database operations like fetching of items to create select lists and IPrincipal for some auditing (like modified by etc.). It cannot work without this UOW. I have configured my web site to use Ninject to inject UOW into Controllers. From controller I pass this UOW when creating view model. But when performing POST operation I am getting No parameterless constructor defined for this object. I have few SelectList type of properties which I have excluded with Bind attribute. How can I overcome this problem? Can I configure Ninject to create the objects of this type and make ModelBinder use it?

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  • How to make whole textarea readable on using link..using jquery

    - by rockers
    I have this code in my view.. <span class="bold">Comment: <%=Html.TextAreaFor(model => model.Comment, new { })%> </span> The comment Field is populating from data base.. the comment is too large text...they are not able to see the entire text on the textarea bec due fixed lengh of the text.. they were asking me to keep the Link beside the Comment Label.. once they click the link they need to see the Entire text what apperas in the textarea in popup bubble? is this possible using jquery? please anybody help me out? thanks

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  • UIWebView goBack method acts differently on different devices

    - by maxpower
    First Device: 8gb 2nd gen Version: 3.1.3 (7E18) Model: MB528LL Second Device: 32gb 3rd gen Version: 3.1.3 (7E18) Model: MC008LL When I call goBack on the 8gb device, shouldStartLoadWithRequest:navigationType: is called When I call goBack on the 32gb device, shouldStartLoadWithRequest:navigationType: is not called I am not doing any caching (not like it works anyway). To make sure it wasn't caching I removed any possible caching via the request object's cache policy and removing all cache whenever webViewDidFinishLoading is called. Same app, same url, everything is the same but the device itself. Why? FYI: shouldStartLoadWithRequest:navigationType: is called on the simulator when goBack is called

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  • Help needed to write a LINQ with GROUP bY(C#3.0)

    - by Newbie
    I have a datatable whose structure is as under Week Dates Key_Factors Factor_Values --- ----- ----------- ------------- 1 29/12/2000 Factor_1 19.20 1 29/12/2000 Factor_2 20.67 1 29/12/2000 Factor_3 10 2 21/12/2007 Factor_1 20.54 2 21/12/2007 Factor_4 21.70 I have a Object model like WeekNumber(int) Dates(Datetime) FactorDictionary (Dictionary<string,double>) I am trying to populate the data from DataTable to my Object Model whose needed output is as under Desired Output ---------------- WeekNumber : 1 Dates : 29/12/2000 FactorDictionary: Key_Factors: Factor_1 Factor_Values:19.20 Key_Factors: Factor_2 Factor_Values:20.67 Key_Factors: Factor_3 Factor_Values:10 WeekNumber : 2 Dates : 21/12/2007 FactorDictionary: Key_Factors: Factor_1 Factor_Values:20.54 Key_Factors: Factor_4 Factor_Values:21.70 i.e. The result is grouped by weeks. Can I achieve the same by using LINQ. I am using C#(3.0) with framework(3.5) Thanks

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  • Scoping two models on approved

    - by Shaun Frost Duke Jackson
    I have three models (Book,Snippet,User) and I'd like to create a scope for where(:approved = true) I'm doing this so I can use the merit gem to define ranking based on count of approved. I'm thinking that writing this as a scope might be to complex but I don't know as I've just started leaning scopes. I've currently got this in my Book & Snippet Model: scope :approved, -> { where(approved: true) } I've playing around with this in my user model but I don't think it's correct: scope :approved, joins(:books && :snippets) Could anyone help start me off or give me some suggestions on what to read?

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  • Django - raw_id_fields title not refreshing.

    - by James Howell
    Hi, I am currently having an issue when using the raw_id_field within admin.py in my Django project. My site's admin area has a number of image upload fields for various different model pages which are all ForeignKey fields to an Image model where all images for the site are stored. As the site will eventually be dealing with a large quantity of images (100s, maybe 1000s) the default select box would be unusable. I created various admin.ModelAdmin classes e.g class InfoSlideAdmin(admin.ModelAdmin): raw_id_fields=('image',) These change the image selector within my Edit pages from a Select Box to a Raw ID Field. However when I select a different image using this control although the ID of the new image is shown the title from the previous image still displays. Any ideas?

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  • Any advice about how to make the design of an application.

    - by VansFannel
    Hello. I want to design an application and I don't know where to start. I know I can use UML to design the application, but I don't know the steps I must follow. I've started doing the UML class diagram, but I suppose, I'm been doing the database model, not the class model for the application. If I don't explain it well, tell me. Is there any tutorial about how to design an application? Thank you.

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  • Where do enumerations belong

    - by griegs
    At my current place of emplyment they were putting enumerations into the class they used them in. Whilst I didn't see any duplication of these enumerations I non the less thought that they didn't belong in the class so I moved them out into their own class. The reason I did that was that I wanted them to be re-usable w/out needing to reference the model class they were originally in. I got asked why I did that by the boss who disagreed with me as to my reasons for moving them and say nothing wrong with putting enumerations in a model class. So where should they be? Is it acceptable to leave enumerations in a class and hope that others in the project know to refactor your code if they want to re-use it elsewhere or should, as I did, you create an enumerations class and have them all in there?

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  • How do I delete in Django? (mysql transactions)

    - by alex
    If you are familiar with Django, you know that they have a Authentication system with User model. Of course, I have many other tables that have a Foreign Key to this User model. If I want to delete this user, how do I architect a script (or through mysql itself) to delete every table that is related to this user? My only worry is that I can do this manually...but if I add a table , but I forget to add that table to my DELETE operation...then I have a row that links to a deleted, non-existing User.

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  • updating a shape in scene with a for loop using javafx

    - by Susanta
    Following is a code fragment. I am updating a rectangle using a for loop when a button is pressed. This is a model for my ultimate intention of showing visualization of data model as it changes large number of times inside a for loop. It works but I see only one change. Now since I am changing the width randomly I should see large number of changes. It seems I am making a wrong assumption on something basic. The code goes below: 7 var rec: Rectangle = Rectangle { 8 x: 10, y: 10 9 width: 140, height: 90 10 fill: Color.BLACK 11 } 12 13 Stage { 14 title: "MyApp" 15 scene: Scene { 16 width: 200 17 height: 200 18 content: [ 19 rec, 20 Button { 21 text: "Button" 22 action: function () { 23 for (i in [1..999]) { 24 rec.width = 25 + java.lang.Math.random()*50; 25 } 26 } 27 } 28 ] 29 } 30 }

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  • How do I check for Existence of a Record in GAE

    - by VDev
    I am trying to create a simple view in Django & GAE, which will check if the user has a profile entity and prints a different message for each case. I have the program below, but somehow GAE always seem to return a object. My program is below import datetime from django.http import HttpResponse, HttpResponseRedirect from google.appengine.api import users from google.appengine.ext import db from models import Profile import logging #from accounts.views import profile # Create your views here. def login_view(request): user = users.get_current_user() profile = db.GqlQuery("SELECT * FROM Profile WHERE account = :1", users.get_current_user()) logging.info(profile) logging.info(user) if profile: return HttpResponse("Congratulations Your profile is already created.") else: return HttpResponse("Sorry Your profile is NOT created.") My model object is Profile defined as follows: class Profile(db.Model): first_name = db.StringProperty() last_name = db.StringProperty() gender = db.StringProperty(choices=set(["Male", "Female"])) account = db.UserProperty(required = True) friends = db.ListProperty(item_type=users.User) last_login = db.DateTimeProperty(required=True) Thanks for the help.

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  • C# Event routing in code behind

    - by Nate
    I'm building a WPF MVVM-ish application. I want to be able to display an event log containing items in a collection that exists in my viewmodel. I want any of the objects in the model to be able to add data to the event log. Therefore every object needs to be able to pass data back to one central collection for databinding in the view. I could implement an event in every one of my data classes and manually pass the events up the object heirarchy but this seems super clumsy. On the visual tree a Routed Event would take care of this, is there some equivelent in the model scope? Any other ideas?

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  • Entity Framework Create Database & Tables At Runtime

    - by dhsto
    I created some tables in an .edmx file and have been generating the database by selecting "Generate Database From Model" and manually executing an .edmx.sql file on the database to build the tables. Now, however, I am creating a setup dialog that allows the user to connect the program up to their own database. I thought running context.CreateDatabase would be good enough to create the database, along with the tables, but the tables are not created. What is the preferred method for creating the database and tables when the user specifies their own server and database to use, when originally starting with a model?

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  • Two Persistence Units, Two entityManagerFactory(s), SPring, JPA, Hibernate

    - by sebajb
    I am using Two entityManagerFactory{1,2} based on two persistence units, autowired through spring, hibernate, with resource local. My DaoImpls are configured with the PersistenceUnit(unitName='...') according to the unit needed. I was under the impression that using them with the unitName specified would allow me to use x number of PUs without problem but I still get: expected single matching bean but found two: [emf1, emf2]. Am I missing some other configuration?

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