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  • Finding out whether an object exists within a plist?

    - by cannyboy
    If I have a plist which I have put into and array, which looks something like this -Root -Item 0 Dictionary Name String Henry Kids Array -Item 0 String Lindy -Item 1 String Paul -Item 1 Dictionary Name String Janet Pets Array -Item 0 String Snoopy -Item 1 String Pebbles How can find out whether each person has kids or pets?

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  • Rails. Putting update logic in your migrations

    - by Daniel Abrahamsson
    A couple of times I've been in the situation where I've wanted to refactor the design of some model and have ended up putting update logic in migrations. However, as far as I've understood, this is not good practice (especially since you are encouraged to use your schema file for deployment, and not your migrations). How do you deal with these kind of problems? To clearify what I mean, say I have a User model. Since I thought there would only be two kinds of users, namely a "normal" user and an administrator, I chose to use a simple boolean field telling whether the user was an adminstrator or not. However, after I while I figured I needed some third kind of user, perhaps a moderator or something similar. In this case I add a UserType model (and the corresponding migration), and a second migration for removing the "admin" flag from the user table. And here comes the problem. In the "add_user_type_to_users" migration I have to map the admin flag value to a user type. Additionally, in order to do this, the user types have to exist, meaning I can not use the seeds file, but rather create the user types in the migration (also considered bad practice). Here comes some fictional code representing the situation: class CreateUserTypes < ActiveRecord::Migration def self.up create_table :user_types do |t| t.string :name, :nil => false, :unique => true end #Create basic types (can not put in seed, because of future migration dependency) UserType.create!(:name => "BASIC") UserType.create!(:name => "MODERATOR") UserType.create!(:name => "ADMINISTRATOR") end def self.down drop_table :user_types end end class AddTypeIdToUsers < ActiveRecord::Migration def self.up add_column :users, :type_id, :integer #Determine type via the admin flag basic = UserType.find_by_name("BASIC") admin = UserType.find_by_name("ADMINISTRATOR") User.all.each {|u| u.update_attribute(:type_id, (u.admin?) ? admin.id : basic.id)} #Remove the admin flag remove_column :users, :admin #Add foreign key execute "alter table users add constraint fk_user_type_id foreign key (type_id) references user_types (id)" end def self.down #Re-add the admin flag add_column :users, :admin, :boolean, :default => false #Reset the admin flag (this is the problematic update code) admin = UserType.find_by_name("ADMINISTRATOR") execute "update users set admin=true where type_id=#{admin.id}" #Remove foreign key constraint execute "alter table users drop foreign key fk_user_type_id" #Drop the type_id column remove_column :users, :type_id end end As you can see there are two problematic parts. First the row creation part in the first model, which is necessary if I would like to run all migrations in a row, then the "update" part in the second migration that maps the "admin" column to the "type_id" column. Any advice?

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  • Namespaces and deserialization issue

    - by CaffGeek
    UPDATE: You can run the code at the end of this to recreate and see the error I am having and hopefully solve it! UPDATE2: It's not the removal of the xmlns="" that's the issue... as you can remove it from the initial xml string. The problem is with the [XmlType(TypeName = "Systems")] somehow causing it to be added... UPDATE3: Turns out the problem is in here, I need to set the TypeName based on what is in the existing, XmlTypeAttribute if it already exists on the class.... xmlAttributes.XmlType = new XmlTypeAttribute { Namespace = "" }; I get the following XML as a string from a webservice <Systems xmlns=""> <System id="1"> <sys_name>ALL</sys_name> </System> <System id="2"> <sys_name>asdfasdf</sys_name> </System> <System id="3"> <sys_name>fasdfasf</sys_name> </System> <System id="4"> <sys_name>asdfasdfasdf</sys_name> </System> </Systems> I then execute this, to convert it to an object result = XElement.Parse(xmlResult.OuterXml).Deserialize<AwayRequestSystems>(); Strangely though, in the Deserialize method, while the RemoveAllNamespaces works and returns the xml without the namespace I get the error <Systems xmlns=''> was not expected. in the catch when return (T) serializer.Deserialize(reader); executes! Why is it doing this? The xmlns is GONE!!! EXECUTABLE CODE! (Just put it in a test project) using System; using System.Collections.Generic; using System.Diagnostics; using System.Linq; using System.Xml; using System.Xml.Linq; using Microsoft.VisualStudio.TestTools.UnitTesting; using System.Xml.Serialization; namespace DeserializationTest { [TestClass] public class UnitTest1 { public TestContext TestContext { get; set; } [TestMethod] public void RemoveXmlnsFromSystems() { var xml = XElement.Parse(@"<Systems xmlns=""""> <System id=""1""> <sys_name>ALL</sys_name> </System> <System id=""2""> <sys_name>ePO</sys_name> </System> <System id=""3""> <sys_name>iEFT</sys_name> </System> <System id=""4""> <sys_name>Away Requests</sys_name> </System> <System id=""5""> <sys_name>RP3</sys_name> </System> </Systems>"); var systems = xml.Deserialize<AwayRequestSystems>(); Assert.IsInstanceOfType(systems, typeof(AwayRequestSystems)); var xmlnsFree = xml.RemoveAllNamespaces(); var str = xmlnsFree.ToString(); Debug.WriteLine(str); Assert.AreNotEqual("Error", xmlnsFree.Name.ToString(), "Serialization Error"); Assert.IsFalse(str.Contains("xmlns"), "Xmlns still exists"); } } [XmlType(TypeName = "Systems")] public class AwayRequestSystems : List<AwayRequestSystem> { } [XmlType(TypeName = "System")] public class AwayRequestSystem { [XmlAttribute("id")] public int ID { get; set; } [XmlElement("sys_name")] public string Name { get; set; } } public static class XmlSerializerFactory { private static Dictionary<Type, XmlSerializer> _serializers = new Dictionary<Type, XmlSerializer>(); public static void ResetCache() { _serializers = new Dictionary<Type, XmlSerializer>(); } public static XmlSerializer GetSerializerFor(Type typeOfT) { if (!_serializers.ContainsKey(typeOfT)) { var xmlAttributes = new XmlAttributes(); var xmlAttributeOverrides = new XmlAttributeOverrides(); Debug.WriteLine(string.Format("XmlSerializerFactory.GetSerializerFor(typeof({0}));", typeOfT)); xmlAttributes.XmlType = new XmlTypeAttribute { Namespace = "" }; xmlAttributes.Xmlns = false; var types = new List<Type> { typeOfT, typeOfT.BaseType }; foreach (var property in typeOfT.GetProperties()) { types.Add(property.PropertyType); } types.RemoveAll(t => t.ToString().StartsWith("System.")); foreach (var type in types) { if (xmlAttributeOverrides[type] == null) xmlAttributeOverrides.Add(type, xmlAttributes); } var newSerializer = new XmlSerializer(typeOfT, xmlAttributeOverrides); //var newSerializer = new XmlSerializer(typeOfT, xmlAttributeOverrides, types.ToArray(), new XmlRootAttribute(), string.Empty); //var newSerializer = new XmlSerializer(typeOfT, string.Empty); _serializers.Add(typeOfT, newSerializer); } return _serializers[typeOfT]; } } public static class XElementExtensions { public static XElement RemoveAllNamespaces(this XElement source) { if (source.HasAttributes) source.Attributes().Where(a => a.Name.LocalName.Equals("xmlns")).Remove(); return source.HasElements ? new XElement(source.Name.LocalName, source.Attributes()/*.Where(a => !a.Name.LocalName.Equals("xmlns"))*/, source.Elements().Select(el => RemoveAllNamespaces(el)) ) : new XElement(source.Name.LocalName) { Value = source.Value }; } } public static class SerializationExtensions { public static XElement Serialize(this object source) { try { var serializer = XmlSerializerFactory.GetSerializerFor(source.GetType()); var xdoc = new XDocument(); using (var writer = xdoc.CreateWriter()) { serializer.Serialize(writer, source, new XmlSerializerNamespaces(new[] { new XmlQualifiedName("", "") })); } var result = (xdoc.Document != null) ? xdoc.Document.Root : new XElement("Error", "Document Missing"); return result.RemoveAllNamespaces(); } catch (Exception x) { return new XElement("Error", x.ToString()); } } public static T Deserialize<T>(this XElement source) where T : class { //try //{ var serializer = XmlSerializerFactory.GetSerializerFor(typeof(T)); var cleanxml = source.RemoveAllNamespaces(); var reader = cleanxml.CreateReader(); return (T)serializer.Deserialize(reader); //} //catch (Exception x) //{ // return null; //} } } }

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  • Possible to split one JAX-WS service across multiple source files?

    - by Rob S.
    Hi everyone, Is it possible to split a web service in to multiple classes and still provide a single path to the web service? I know this isn't possible because of the duplicate url-pattern values. It sort of illustrates where we're wanting to go :) <endpoint name="OneBigService" implementation="SmallImpl1" url-pattern="/OneBigService"/> <endpoint name="OneBigService" implementation="SmallImpl2" url-pattern="/OneBigService"/> Basically, how do avoid having one monolithic @WebService class? Thanks! Rob

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  • Is gethostbyname guaranteed to return hostent structures with IPv4 addresses?

    - by Robert
    I cannot use getaddrinfo(...) for resolving hostnames and therefore must stick to gethostbyname(...) Is the gethostbyname(...) function guaranteed to return hostent structures that contain only IPv4 (AF_INET) addresses on success, so that the following code would always lead to an IPv4 address: int resolve(const char *name, struct in_addr *addr) { struct hostent *he = gethostbyname(name); if (!he) return 1; memcpy(addr,he->h_addr_list[0],4); return 0; }

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  • Android - Eclipse setup missing Google APIs

    - by teepusink
    Hi, I just finished setting up my Eclipse with the Android plug-in. (i.e https://dl-ssl.google.com/android/eclipse/) Now when I do the following 1. Eclipse Preferences Android, I see a lot of "Target Name" like Android 1.1 - Android 2.1 However, in the book that I'm reading, I'm also supposed to see a "Target Name" called "Google APIs". I don't see that. What am I missing? Is that a separate install? Thank you, Tee

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  • What's wrong with my JSON?

    - by Ronald
    Anybody out there notice anything wrong with this JSON? It validates at JSONLint.com, but neither Chrome nor Firefox's native JSON parse functions will properly parse it. Any ideas? { "result": "{\"players\":[{\"name\":\"User 522\",\"turn\":true,\"score\":0},{\"name\":\"User 925\",\"turn\":false,\"score\":5}],\"enableControls\":false}", "error": "null", "id": "7" }

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  • Response is not available in this context when creation cookie's

    - by Sadegh
    hi i defined one class to create cookie by received parameter's from user. when i want to add cookie to context i receive an exception. My Class public static class ManageCookies { public static void Create(string name, string value) { HttpCookie cookie = new HttpCookie(name); cookie.Value = value; cookie.Expires = DateTime.Now.AddYears(1); HttpContext.Current.Response.Cookies.Add(cookie); } } Occured Exception: Response is not available in this context.

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  • convert perl map with multiple key to c++

    - by YY
    I want to convert a code from perl to c++, and my problem is multi key map in perl! example: perl: $address{name}{familyName} = $someAddress; and keys are not unique. I want similar data structure in c++ using map or ...!? also I want to search and obtain values with first key for example I want such %keys{name} in c++ .

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  • Speeding up templates in GAE-Py by aggregating RPC calls

    - by Sudhir Jonathan
    Here's my problem: class City(Model): name = StringProperty() class Author(Model): name = StringProperty() city = ReferenceProperty(City) class Post(Model): author = ReferenceProperty(Author) content = StringProperty() The code isn't important... its this django template: {% for post in posts %} <div>{{post.content}}</div> <div>by {{post.author.name}} from {{post.author.city.name}}</div> {% endfor %} Now lets say I get the first 100 posts using Post.all().fetch(limit=100), and pass this list to the template - what happens? It makes 200 more datastore gets - 100 to get each author, 100 to get each author's city. This is perfectly understandable, actually, since the post only has a reference to the author, and the author only has a reference to the city. The __get__ accessor on the post.author and author.city objects transparently do a get and pull the data back (See this question). Some ways around this are Use Post.author.get_value_for_datastore(post) to collect the author keys (see the link above), and then do a batch get to get them all - the trouble here is that we need to re-construct a template data object... something which needs extra code and maintenance for each model and handler. Write an accessor, say cached_author, that checks memcache for the author first and returns that - the problem here is that post.cached_author is going to be called 100 times, which could probably mean 100 memcache calls. Hold a static key to object map (and refresh it maybe once in five minutes) if the data doesn't have to be very up to date. The cached_author accessor can then just refer to this map. All these ideas need extra code and maintenance, and they're not very transparent. What if we could do @prefetch def render_template(path, data) template.render(path, data) Turns out we can... hooks and Guido's instrumentation module both prove it. If the @prefetch method wraps a template render by capturing which keys are requested we can (atleast to one level of depth) capture which keys are being requested, return mock objects, and do a batch get on them. This could be repeated for all depth levels, till no new keys are being requested. The final render could intercept the gets and return the objects from a map. This would change a total of 200 gets into 3, transparently and without any extra code. Not to mention greatly cut down the need for memcache and help in situations where memcache can't be used. Trouble is I don't know how to do it (yet). Before I start trying, has anyone else done this? Or does anyone want to help? Or do you see a massive flaw in the plan?

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  • Is derived table executed once or three times?

    - by AspOnMyNet
    Every time you make use of a derived table, that query is going to be executed. When using a CTE, that result set is pulled back once and only once within a single query. Does the quote suggest that the following query will cause derived table to be executed three times ( once for each aggregate function’s call ): SELECT AVG(OrdersPlaced),MAX(OrdersPlaced),MIN(OrdersPlaced) FROM ( SELECT v.VendorID, v.[Name] AS VendorName, COUNT(*) AS OrdersPlaced FROM Purchasing.PurchaseOrderHeader AS poh INNER JOIN Purchasing.Vendor AS v ON poh.VendorID = v.VendorID GROUP BY v.VendorID, v.[Name] ) AS x thanx

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  • how to import a.py not a folder

    - by zjm1126
    zjm_code |-----a.py |-----a |----- __init__.py |-----b.py in a.py is : c='ccc' in b.py is : import a print dir(a) when i execute b.py ,it show (it import 'a' folder): ['__builtins__', '__doc__', '__file__', '__name__', '__path__'] and when i delete a folder, it show ,(it import a.py): ['__builtins__', '__doc__', '__file__', '__name__', 'c'] so my question is : how to import a.py via not delete a folder thanks

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  • Ruby on Rails check box not updating on form submission

    - by user284194
    I have an entries controller that allows users to add contact information the website. The user-submitted information isn't visible to users until the administrator checks a check box and submits the form. So basically my problem is that if I check the check box as an administrator while initially creating an entry (entries#new) the entry will be publicly visible as expected, but if a non-admin user creates an entry (the normal user view doesn't include the 'live' check box, only the admin one does) then that entry is stuck in limbo because the entries#edit view for some reason doesn't update the boolean check box value when logged in as an admin. entries#new view: <% form_for(@entry) do |f| %> <%= f.error_messages %> Name<br /> <%= f.text_field :name %> Mailing Address<br /> <%= f.text_field :address %> #... <%- if current_user -%> <%= f.label :live %><br /> <%= f.check_box :live %> <%- end -%> <%= f.submit 'Create' %> <% end %> entries#edit (only accessible by admin) view: <% form_for(@entry) do |f| %> <%= f.error_messages %> <%= f.label :name %><br /> <%= f.text_field :name %> Mailing Address<br /> <%= f.text_field :address %> <%= f.label :live %><br /> <%= f.check_box :live %> <%= f.submit 'Update' %> <% end %> Any ideas as to why an administrator can't update the :live check box from the edit view? I would greatly appreciate any suggestions. I'm new to rails. I can post more code if it's needed. Thanks for reading my question.

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  • Encrypting property values in Nant

    - by Diego C.
    I need to store authentication information and I rather not have the password in plain text: <property name="user" value="theUser"/> <property name="password" value="secret"/> Has anyone figured out a way to encrypt property values in Nant? I've looked in Nant and Nantcontrib docs but no mention of encryption. I am considering going the route of creating my own Nant Task. Any suggestions?

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  • Using GET Method to Maintain Variables After Logging In

    - by John
    Hello, I am using a login system. When I navigate to comments/index.php without logging in, some variables get passed along using the GET method just fine. Then, if I log in while I am on this page, these variables disappear. The variables that disappear are $submission, $submissionid, and $url. I thought I could use the GET method to keep them live after logging in by appending ?submission='.$submission.'&submissionid='.$submissionid.'&url='.$url.' to the URL of the login form action as seen below. But the variables still disappeared after I made this addition. The relevant code I am trying to use is below. Any idea what I can do to make it do what I want? Thanks in advance, John In comments/index.php: require_once "header.php"; include "login.php"; include "comments.php"; In login.php: if (!isLoggedIn()) { if (isset($_POST['cmdlogin'])) { if (checkLogin($_POST['username'], $_POST['password'])) { show_userbox(); } else { echo "Incorrect Login information !"; show_loginform(); } } else { show_loginform(); } } else { show_userbox(); } In comments.php: $url = mysql_real_escape_string($_GET['url']); echo '<div class="subcommenttitle"><a href="http://www.'.$url.'">'.$submission.'</a></div>'; $submission = mysql_real_escape_string($_GET['submission']); $submissionid = mysql_real_escape_string($_GET['submissionid']); The login function: function show_loginform($disabled = false) { echo '<form name="login-form" id="login-form" method="post" action="./index.php?submission='.$submission.'&submissionid='.$submissionid.'&url='.$url.'"> <div class="usernameformtext"><label title="Username">Username: </label></div> <div class="usernameformfield"><input tabindex="1" accesskey="u" name="username" type="text" maxlength="30" id="username" /></div> <div class="passwordformtext"><label title="Password">Password: </label></div> <div class="passwordformfield"><input tabindex="2" accesskey="p" name="password" type="password" maxlength="15" id="password" /></div> <div class="registertext"><a href="http://www...com/sandbox/register.php" title="Register">Register</a></div> <div class="lostpasswordtext"><a href="http://www...com/sandbox/lostpassword.php" title="Lost Password">Lost password?</a></div> <p class="loginbutton"><input tabindex="3" accesskey="l" type="submit" name="cmdlogin" value="Login" '; if ($disabled == true) { echo 'disabled="disabled"'; } echo ' /></p></form>'; }

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  • Read file from root directory folder using filestream

    - by SurajSing
    There are two Image files in my folder which I have to call in my program. I have used: AppDomain.curentDomain.baseDirectory + "Path and file name"; But this goes into my bin directory which I don't want; I want to read the folder from root directory where my folder name as resource I have saved my file there and call the image so please what's the code for that? How do I read from root directory in a Windows Form Application?

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  • Rails 3 HTTP digest authentication

    - by Cimm
    Is HTTP digest authentication still supported in Rails 3? I tried the following code in Rails 2.3.5, it works. class Admin::BaseController < ApplicationController before_filter :authenticate USERS = { "lifo" => "world" } def authenticate authenticate_or_request_with_http_digest("Application") do |name| USERS[name] end end end Now, the same thing in Rails 3.0.0.beta) returns an error: can't convert nil into String Am I missing something or is this a bug in Rails 3? HTTP basic authentication works fine.

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