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• Deserialize JSON, sometimes value is an array, sometimes "" (blank string).

  - by karl.r

  I am trying to deserialize a field: "presenters":[{...},{...}] but some of the rows come back with only: "presenters":"" When the serializer gets to the row with that empty string I get: Error converting value "" to type 'System.Collections.Generic.List`1[DataPrototype.Model.Presenter]'. Am I right in thinking that I need a JsonConverter that will change the empty string into an empty List?

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• Cascading MVC controllers with CatchAll Routes

  - by Richard

  Hi, I have an MVC app which has its routes defined with the final route being a catch all route to a "PageController" for a database driven collection of pages. What I want to achieve is to be able to plugin to the app a second controller to the catch all route which the first controller passes on to if it does not find the url recieved in the database. Effectively I want to queue up controllers with catch all actions: public ActionResult PageCatchall(string url) { var page = repository.Get<Page>(string url); if (page != null) { // Handle the request return View(page) } // Otherwise pass to a new controller ???? } Anyone have any good ideas as to how to solve this? I have tried RedirectToAction but that requires that the next controller has a different route to the action. I have tried ActionInvoker but this failed to work the way I did it.

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• SQL Server: How to tell if a database is a system database?

  - by Vinko Vrsalovic

  I know that so far (until MSSQL 2005 at least), system databases are master, model, msdb and tempdb. Thing is, as far as I can tell, this is not guaranteed to be preserved in the future. And neither the sys.databases view nor the sys.sysdatabases view tell me if a database is considered as a system database. Is there someplace where this information (whether a database is considered a system database or not) can be obtained?

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• cakephp COUNT items per month in a year

  - by HyperCas

  How do you use cakephp to count, for example the number of posts, made every month in a year? Preferably using Model-find('count') and get the data in an array.

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• Django database - how to add this column in raw SQL.

  - by alex

  Suppose I have my models set up already. class books(models.Model): title = models.CharField... ISBN = models.Integer... What if I want to add this column to my table? user = models.ForeignKey(User, unique=True) How would I write the raw SQL in my database so that this column works?

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• Is there a way to have three way habtm associations in rails / activerecord?

  - by txwikinger

  Often three (or more) way associations are needed for habtm associations. For instance a permission model with roles. A particular area of functionality has many users which can access many areas. The permissions on the area are setup via roles (habtm) The user/roles association is also habtm The permissions (read, write, delete, etc) are habtm towards roles. How would that be best done with rails/activerecord?

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• Best way to make an attribute always an array?

  - by Shadowfirebird

  I'm using my MOO project to teach myself Test Driven Design, and it's taking me interesting places. For example, I wrote a test that said an attribute on a particular object should always return an array, so -- t = Thing.new("test") p t.names #-> ["test"] t.names = nil p t.names #-> [] The code I have for this is okay, but it doesn't seem terribly ruby to me: class Thing def initialize(names) self.names = names end def names=(n) n = [] if n.nil? n = [n] unless n.instance_of?(Array) @names = n end attr_reader :names end Is there a more elegant, Ruby-ish way of doing this? (NB: if anyone wants to tell me why this is a dumb test to write, that would be interesting too...)

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• Are there any open source C# libraries for binding the properties from one class to another?

  - by Jason Slocomb

  I don't remember which blog I was reading, because it seemed academic at the time, but there was a library being discussed where you could take a two concrete classes and bind the properties together if the names matched. Think ASP.NET MVC model binding.

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• Viewmodels and Models, howto split them up

  - by molgan

  Hello I'm using asp.net mvc 2 and I'm not sure howto structure the models and viewmodels. In the nerddinner there is only 1 of each. Shall I have only 1 viewmodel of each entity (?) and then have 1 model for each form-modifing viewpage? So that viewmodel contains like all it ever would need, like: PagedFoo FooClass ..., FooClass, Foowithbunnies, FooClassStats... ? /M

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• grails: quering in a composite structure

  - by Asaf David

  hey i have the following domain model: class Location { String name static hasMany = [locations:Location, persons:Person] } class Person { String name } so basically each location can hold a bunch of people + "sub-locations". what is the best way to recursively query for all persons under a location (including it's sub locations, and their sub locations, etc')?

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• Internal classes with ADO.NET Entity Framework

  - by Regent

  I'm using Entity Framework for creation of my Data Access Layer and I want for all of my classes to be internal. I know it is possible to manually assign it manually in the designer for each class. But looks like it also requires to set internal modifier for each single property in every class! I have about 30+ entities and it will be a huge work to do. Do you know any ideas how to set a 'default access' for the entire model?

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• jQuery template and Backbone.js

  - by testndtv

  I am trying to create an app which uses a combination of jQuery templates and Backbone.js I have very little experience in both of them (though I know jQuery) Could you please provide some good examples where jQuery templates and Backbone.js are used effectively. Also I am loooking at using JSON for the model/data and trying to persist the data (I use Java at the backend)..So looking for ideas on how that can be integrated? Thank you.

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• Why does the default view for a List in ASP.NET MVC use 'var' to iterate through the items?

  - by SLC

  The title pretty much sums it up, it puts the following line of code in: <% foreach (var item in Model) { %> As the View is auto-generated and uses reflection to work out exactly what item is, so you get intellisense and everything, I just wonder, why do they use var rather than the actual type?

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• How to tell Reflectively if an Attribute has a public Setter

  - by DrLazer

  Im saving an object model out to XML but when i load it back in I get exceptions when trying to use PropertyInfo.SetValue() because the property doesn't have a setter just a getter. I want to either not save out the properties that only have getters or figure out on load whether its valid for me to try and set a value or not. Anybody know how to do this Cheers

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• ASP.NET MVC: Optionally render element attribute

  - by majkinetor

  I know there is some syntax with ? to optionally render attribute. But I can't find it now that I need it ... Something like: < input checked=<%? model.IsActivated % > ... Thanks.

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• How do the different services in Oracle SOA relate to each other?

  - by Zubair

  I'm am trying to figure out how the Oracle "Layered Architecture Model" works, and I am very confused about what the business, data, and presentation do, and how they relate to each other. I have seen many diagrams showing how this should work, but some real world examples would be useful?

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• add new records using signal in django admin

  - by ganesh

  I've a model called broadcastinfo, It has fields viz.. info,userid...userid is excluded. when i add an new info, my broadcastinfo table should get the records of all userid from user table and the given message. Im trying this via signal.Any idea is highly appreciated. Thanks

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• What is going to be "the next Hype" ? [closed]

  - by kabado

  I know it's a very vague question, but maybe the answers could act like a poll about what could possibly be the next big event in computer science. A new language ? A new technology ? A new architecture ? A new business model ? Please provide details, what is it and why do you think it's going to rule the world.

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• What kinds of strategies are their for paging result sets for web UIs?

  - by predhme

  I am looking at implementing a paging strategy for a domain model who's numbers are in the hundreds of thousands. I am most interested in how websites that are performance conscience achieve this.

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• How do I use .find for the last five days in ruby on rails?

  - by Angela

  Have a model called contact_email.date_sent I want to be able to run a report which displays all those where the date_sent range is between date.today and date.today 5 days ago. I assume I use something like @send_emails = Contact_Email.find(:conditions=> ???) But not clear what exactly is the best way. Thanks!

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• Render dropdown as text for particular action in ASP.NET MVC

  - by Dan

  I have a partial view that I use for editing and creating my models. When a user is editing the model, I would like a particular drop-down to be rendered as text as I don't want them to change it. A read-only drop-down would suffice, but I'd prefer text. I'm thinking I can accomplish this via an extension method, but I'm not quite sure how to get started. Any help would be appreciated!

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• Can I use an ORM (as Subsonic) to work with an API?

  - by Gabotron

  Hello ... I´m new to ORMs and I have a new project I´ll do in .Net MVC. In the Model Layer I´ll create my classes: Videos and I´ll work with APIs as a DataLayer (BrightCove & YouTube APIs). So, I dont have a Relational Database as a Data Layer. Is it possible to work with an ORM (as Subsonic)? Thanks!

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• CodeIgniter copying an instance - performance issues?

  - by fire

  I have quite a few libraries and models that get loaded into a controller, and each library/model creates an instance of CI using $this->CI =& get_instance(); in the __construct function. Are there any performance issues with this and is there a better way?

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• Ruby xml rpc error handilng

  - by stel

  I have a model class Car @@RPCServer = XMLRPC::Client.new("localhost", "/", 8080) def self.count @@RPCServer.call("cars.count") end end If server is not running on localhost:8080 I've got a Errno::ECONNREFUSED error. I want to display an error message to user, how can a handle this error?

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• can i change the image place using jquery

  - by kumar

  I have jquery datepicker code where i am dispalying one calander control to dispaly dateand time $("input[id^='exc-flwup-<%=Model.ExceptionID%>']").datepicker({ duration: 0, buttonImage: '/Content/images/calender.gif', buttonImageOnly: true, showOn:'button', constrainInput: true, showTime: true, stepMinutes: 30, stepHours: 1, altTimeField: '', time24h: true, minDate: 0 }); Image button is allways coming left side of my textbox I need to keep it right side of my textbox is there any way I can adjust my image on this? thanks

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