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  • Devise not allowing active resource to access the services

    - by Saurabh Pandit
    In my application there are two folders one for a rails application and another for a ruby application. In the ruby folder I have created a ruby file in which I have written code to access some model which is present in the rails application using active resource. Sample code is shown below : active_resource_example.rb require 'rubygems' require 'active_resource' class Website < ActiveResource::Base self.site = "http://localhost:3000/admin/" self.user = "user" self.password = "password" end websites = Website.find(:all) puts websites.inspect In my rails application I have used ActiveAdmin gem which uses devise for authentication. On rails Server I get the following result : Started GET "/admin/websites.json" for 192.168.1.37 at 2011-11-12 14:41:06 +0530 Processing by Admin::WebsitesController#index as JSON Completed in 43ms And on my terminal where I executed active_resource_example.rb, I got following error : user@user:~/Desktop$ ruby active_resource_example.rb /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/connection.rb:132:in `handle_response': Failed. Response code = 401. Response message = Unauthorized . (ActiveResource::UnauthorizedAccess) from /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/connection.rb:115:in `request' from /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/connection.rb:80:in `block in get' from /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/connection.rb:218:in `with_auth' from /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/connection.rb:80:in `get' from /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/base.rb:894:in `find_every' from /home/user/.rvm/gems/ruby-1.9.2-p180/gems/activeresource-3.1.1/lib/active_resource/base.rb:806:in `find' from active_resource_example.rb:12:in `<main>' user@user:~/Desktop$ I tried this with another application in which Devise authentication is not used with the same configuration I used in active_resource_example.rb, there I got the result. Desperately need some solution to this issue.

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  • nHibernate Domain Model and Mapping Files in Separate Projects

    - by Blake Blackwell
    Is there a way to separate out the domain objects and mapping files into two separate projects? I would like to create one project called MyCompany.MyProduct.Core that contains my domain model, and another project that is called MyCompany.MYProduct.Data.Oracle that contains my Oracle data mappings. However, when I try to unit test this I get the following error message: Named query 'GetClients' not found. Here is my mapping file: <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" assembly="MyCompany.MyProduct.Core" namespace="MyCompany.MyProduct.Core" > <class name="MyCompany.MyProduct.Core.Client" table="MY_CLIENT" lazy="false"> <id name="ClientId" column="ClientId"></id> <property name="ClientName" column="ClientName" /> <loader query-ref="GetClients"/> </class> <sql-query name="GetClients" callable="true"> <return class="Client" /> call procedure MyPackage.GetClients(:int_SummitGroupId) </sql-query> </hibernate-mapping> Here is my unit test: try { var cfg = new Configuration(); cfg.Configure(); cfg.AddAssembly( typeof( Client ).Assembly ); ISessionFactory sessionFactory = cfg.BuildSessionFactory(); IStatelessSession session = sessionFactory.OpenStatelessSession(); IQuery query = session.GetNamedQuery( "GetClients" ); query.SetParameter( "int_SummitGroupId", 3173 ); IList<Client> clients = query.List<Client>(); Assert.AreNotEqual( 0, clients.Count ); } catch( Exception ex ) { throw ex; } I think I may be improperly referencing the assembly, because if I do put the domain model object in the MyComapny.MyProduct.Data.Oracle class it works. Only when I separate out in to two projects do I run into this problem.

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  • How should I go about implementing a points-to analysis in Maude?

    - by reprogrammer
    I'm going to implement a points-to analysis algorithm. I'd like to implement this analysis mainly based on the algorithm by Whaley and Lam. Whaley and Lam use a BDD based implementation of Datalog to represent and compute the points-to analysis relations. The following lists some of the relations that are used in a typical points-to analysis. Note that D(w, z) :- A(w, x),B(x, y), C(y, z) means D(w, z) is true if A(w, x), B(x, y), and C(y, z) are all true. BDD is the data structure used to represent these relations. Relations input vP0 (variable : V, heap : H) input store (base : V, field : F, source : V) input load (base : V, field : F, dest : V) input assign (dest : V, source : V) output vP (variable : V, heap : H) output hP (base : H, field : F, target : H) Rules vP(v, h) :- vP0(v, h) vP(v1, h) :- assign(v1, v2), vP(v2, h) hP(h1, f,h2) :- store(v1, f, v2), vP(v1, h1), vP(v2, h2) vP(v2, h2) :- load(v1, f, v2), vP(v1, h1), hP(h1, f, h2) I need to understand if Maude is a good environment for implementing points-to analysis. I noticed that Maude uses a BDD library called BuDDy. But, it looks like that Maude uses BDDs for a different purpose, i.e. unification. So, I thought I might be able to use Maude instead of a Datalog engine to compute the relations of my points-to analysis. I assume Maude propagates independent information concurrently. And this concurrency could potentially make my points-to analysis faster than sequential processing of rules. But, I don't know the best way to represent my relations in Maude. Should I implement BDD in Maude myself, or Maude's internal unification based on BDD has the same effect?

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  • how can I write a schema that produce an unordered xml with extension

    - by ekeren
    In the following schema I am trying to make an unordered xml that extends simpleConfigurationObject: <xs:complexType name="forTestingConfigurationObjectCreator"> <xs:complexContent> <xs:extension base="simpleConfigurationObject"> <xs:all> <xs:element name="a" type="xs:string"/> <xs:element name="b" type="xs:string" minOccurs="0"/> </xs:all> </xs:extension> </xs:complexContent> </xs:complexType> <xs:complexType name="simpleConfigurationObject"> <xs:all> <xs:element name="base" type="xs:string" minOccurs="0"/> </xs:all> </xs:complexType> But I get the following error on the xs:all "all is not the only particle in the group, or is being used as an extension" (which is correct) Off-course if put the base element inside the xs:all and not use xs:extension at all I will get an unordered schema restriction. (but that is not what I want) The question is: how can I produce unordered schema with the extension? Thanks

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  • Running multiple instances of tomcat in eclipse WTP

    - by lisak
    Hey, SCENARIO: 10 CATALINA_BASEs with own configuration (always the same port numbers 8080, but 10 different IP/hostnames on one host via virtual IPs). created a server in WTP and pick "Use the custom location" option in the server configuration in eclipse. New configuration files are created in workspace/Server/server-name-config/ Set up the server path and deploy path for my catalina base (not the internal .metadata one) After I started it, the new configuration files overwrote the original catalina-base/conf files I had there - I was glad, it should be like this but after I made changes in the eclipse config files workspace/Server/server-name-config/ and restarted the server, the changes didn't appeared in the original files in CATALINA_BASE/conf What the hell is that ? So I set the CATALINA_BASE/conf/server.xml to fault configuration and restarted tomcat from eclipse and it worked ! it took the configuration from /Server/server-name-config/server.xml Then I deleted CATALINA_BASE/conf/server.xml and it said that there is no server.xml in catalina base ! How is it possible ? I don't understand why eclipse WTP developers made so tight integration. There should by just symbolic links in /Server/server-name-config/ pointing to CATALINA_BASE/conf/ ... now there is a weird system which is totally unpredictable. The changes in /Server/server-name-config/ are not reflected in CATALINA_BASE/conf ... from where the standard bootstrap.jar or other catalina classloaders and classes build server, engine and other objects with particular setting. Moreover the CATALINA_BASEs could be used outside eclipse then. The second problem, I'm setting up various things in CATALINA_BASE/bin/startup.sh and setenv.sh which is easy cause I can use bash for it. Is then modifying VM parameters in the "Open launch configuration" settings the only way how to do it in eclipse ? Sorry for such a huge pile of questions, but I'm annoyed by the fact that it is much better to not use eclipse WTP for this because it is very poorly designed and it's a shame because this would spare me a lot of time. And using the internal .metadata/ instances it's even more terrifying way that the one I described.

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  • How do I get syncdb db_table and app_label to play nicely together

    - by Chris Heisel
    I've got a model that looks something like this: class HeiselFoo(models.Model): title = models.CharField(max_length=250) class Meta: """ Meta """ app_label = "Foos" db_table = u"medley_heiselfoo_heiselfoo" And whenever I run my test suite, I get an error because Django isn't creating the tables for that model. It appears to be an interaction between app_label and db_table -- as the test suite runs normally if db_table is set, but app_label isn't. Here's a link to the full source code: http://github.com/cmheisel/heiselfoo Here's the traceback from the test suite: E ====================================================================== ERROR: test_truth (heiselfoo.tests.HeiselFooTests) ---------------------------------------------------------------------- Traceback (most recent call last): File "/Users/chris/Code/heiselfoo/ve/lib/python2.6/site-packages/heiselfoo/tests.py", line 10, in test_truth f.save() File "/Users/chris/Code/heiselfoo/ve/lib/python2.6/site-packages/django/db/models/base.py", line 434, in save self.save_base(using=using, force_insert=force_insert, force_update=force_update) File "/Users/chris/Code/heiselfoo/ve/lib/python2.6/site-packages/django/db/models/base.py", line 527, in save_base result = manager._insert(values, return_id=update_pk, using=using) File "/Users/chris/Code/heiselfoo/ve/lib/python2.6/site-packages/django/db/models/manager.py", line 195, in _insert return insert_query(self.model, values, **kwargs) File "/Users/chris/Code/heiselfoo/ve/lib/python2.6/site-packages/django/db/models/query.py", line 1479, in insert_query return query.get_compiler(using=using).execute_sql(return_id) File "/Users/chris/Code/heiselfoo/ve/lib/python2.6/site-packages/django/db/models/sql/compiler.py", line 783, in execute_sql cursor = super(SQLInsertCompiler, self).execute_sql(None) File "/Users/chris/Code/heiselfoo/ve/lib/python2.6/site-packages/django/db/models/sql/compiler.py", line 727, in execute_sql cursor.execute(sql, params) File "/Users/chris/Code/heiselfoo/ve/lib/python2.6/site-packages/django/db/backends/sqlite3/base.py", line 200, in execute return Database.Cursor.execute(self, query, params) DatabaseError: no such table: medley_heiselfoo_heiselfoo ---------------------------------------------------------------------- Ran 1 test in 0.004s FAILED (errors=1) Creating test database 'default'... No fixtures found. medley_heiselfoo_heiselfoo Destroying test database 'default'...

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  • Deserializing a FileStream on Client using WCF

    - by Grandpappy
    I'm very new to WCF, so I apologize in advance if I misstate something. This is using .NET 4.0 RC1. Using WCF, I am trying to deserialize a response from the server. The base response has a Stream as its only MessageBodyMember. public abstract class StreamedResponse { [MessageBodyMember] public Stream Stream { get; set; } public StreamedResponse() { this.Stream = Stream.Null; } } The derived versions of this class are actually what's serialized, but they don't have a MessageBodyMember attribute (they have other base types such as int, string, etc listed as MessageHeader values). [MessageContract] public class ChildResponse : StreamedResponse { [DataMember] [MessageHeader] public Guid ID { get; set; } [DataMember] [MessageHeader] public string FileName { get; set; } [DataMember] [MessageHeader] public long FileSize { get; set; } public ChildResponse() : base() { } } The Stream is always a FileStream, in my specific case (but may not always be). At first, WCF said FileStream was not a known type, so I added it to the list of known types and now it serializes. It also appears, at first glance, to deserialize it on the client's side (it's the FileStream type). The problem is that it doesn't seem to be usable. All the CanRead, CanWrite, etc are false, and the Length, Position, etc properties throw exceptions when being used. Same with ReadByte(). What am I missing that would keep me from getting a valid FileStream?

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  • sorl-thumbnail unit tests fail by 1 pixel (!)

    - by stevejalim
    Hi I'm using sorl-thumbnail in a Django 1.2 (currently 1.2 RC) project and getting a surprising failure of four of sorl's built-in unit tests. Essentially, the resized images are all 1px shorter than the unit tests expect them to be. See below for details I'm developing on OSX 10.5.8 (not Snow Leopard) with Python 2.5.1 (r251:54863, Feb 6 2009, 19:02:12) and PIL 1.1.6. Any thoughts what might be up? Cheers Steve ====================================================================== FAIL: test_extension (sorl.thumbnail.tests.fields.FieldTest) ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/local/django/myprojectnamehere/lib/sorl/thumbnail/tests/fields.py", line 66, in test_extension self.verify_thumbnail((50, 37), thumb, expected_filename) File "/usr/local/django/myprojectnamehere/lib/sorl/thumbnail/tests/base.py", line 92, in verify_thumbnail self.assertEqual(image.size, expected_size) AssertionError: (50, 38) != (50, 37) ====================================================================== FAIL: test_thumbnail (sorl.thumbnail.tests.fields.ImageWithThumbnailsFieldTest) ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/local/django/myprojectnamehere/lib/sorl/thumbnail/tests/fields.py", line 111, in test_thumbnail self.verify_thumbnail((50, 37), thumb, expected_filename) File "/usr/local/django/myprojectnamehere/lib/sorl/thumbnail/tests/base.py", line 92, in verify_thumbnail self.assertEqual(image.size, expected_size) AssertionError: (50, 38) != (50, 37) ====================================================================== FAIL: testTag (sorl.thumbnail.tests.templatetags.ThumbnailTagTest) ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/local/django/myprojectnamehere/lib/sorl/thumbnail/tests/templatetags.py", line 118, in testTag self.verify_thumbnail((90, 67), expected_filename=expected_fn) File "/usr/local/django/myprojectnamehere/lib/sorl/thumbnail/tests/base.py", line 92, in verify_thumbnail self.assertEqual(image.size, expected_size) AssertionError: (90, 68) != (90, 67)

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  • How to read a database record with a DataReader and add it to a DataTable

    - by Olga
    Hello I have some data in a Oracle database table(around 4 million records) which i want to transform and store in a MSSQL database using ADO.NET. So far i used (for much smaller tables) a DataAdapter to read the data out of the Oracle DataBase and add the DataTable to a DataSet for further processing. When i tried this with my huge table, there was a outofmemory exception thrown. ( I assume this is because i cannot load the whole table into my memory) :) Now i am looking for a good way to perform this extract/transfer/load, without storing the whole table in the memory. I would like to use a DataReader and read the single dataRecords in a DataTable. If there are about 100k rows in it, I would like to process them and clear the DataTable afterwards(to have free memory again). Now i would like to know how to add a single datarecord as a row to a dataTable with ado.net and how to completly clear the dataTable out of memory: My code so far: Dim dt As New DataTable Dim count As Int32 count = 0 ' reads data records from oracle database table' While rdr.Read() 'read n records and add them to a dataTable' While count < 10000 dt.Rows.Add(????) count = count + 1 End While 'transform data in the dataTable, and insert it to the destination' ' flush the dataTable after insertion' count = 0 End While Thank you very much for your response!

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  • Partial template specialization on a class

    - by Jonathan Swinney
    I'm looking for a better way to this. I have a chunk of code that needs to handle several different objects that contain different types. The structure that I have looks like this: class Base { // some generic methods } template <typename T> class TypedBase : public Base { // common code with template specialization private: std::map<int,T> mapContainingSomeDataOfTypeT; } template <> class TypedBase<std::string> : public Base { // common code with template specialization public: void set( std::string ); // functions not needed for other types std::string get(); private: std::map<int,std::string> mapContainingSomeDataOfTypeT; // some data not needed for other types } Now I need to add some additional functionality that only applies to one of the derivative classes. Specifically the std::string derivation, but the type doesn't actually matter. The class is big enough that I would prefer not copy the whole thing simply to specialize a small part of it. I need to add a couple of functions (and accessor and modifier) and modify the body of several of the other functions. Is there a better way to accomplish this?

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  • How to get rid of void-pointers.

    - by Patrick
    I inherited a big application that was originally written in C (but in the mean time a lot of C++ was also added to it). Because of historical reasons, the application contains a lot of void-pointers. Before you start to choke, let me explain why this was done. The application contains many different data structures, but they are stored in 'generic' containers. Nowadays I would use templated STL containers for it, or I would give all data structures a common base class, so that the container can store pointers to the base class, but in the [good?] old C days, the only solution was to cast the struct-pointer to a void-pointer. Additionally, there is a lot of code that works on these void-pointers, and uses very strange C constructions to emulate polymorphism in C. I am now reworking the application, and trying to get rid of the void-pointers. Adding a common base-class to all the data structures isn't that hard (few days of work), but the problem is that the code is full of constructions like shown below. This is an example of how data is stored: void storeData (int datatype, void *data); // function prototype ... Customer *myCustomer = ...; storeData (TYPE_CUSTOMER, myCustomer); This is an example of how data is fetched again: Customer *myCustomer = (Customer *) fetchData (int datatype, char *key); I actually want to replace all the void-pointers with some smart-pointer (reference-counted), but I can't find a trick to automate (or at least) help me to get rid of all the casts to and from void-pointers. Any tips on how to find, replace, or interact in any possible way with these conversions?

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  • android odbc connection

    - by Vijay Kumar
    i want to connect odbc connection for my android application. Here in my program i'm using oracle database 11g and my table name is sample. After i run the program close the emulator open the database the values could not be stored. Please give one solution or any changes in my program or connection string. package com.odbc; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import android.app.Activity; import android.os.Bundle; public class OdbcActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); String first="vijay"; String last="kumar"; try { DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver()); Connection con=DriverManager.getConnection("jdbc:oracle:thin:@localshot:1521:XE","system","vijay"); PreparedStatement pst=con.prepareStatement("insert into sample(first,last) values(?,?"); pst.setString(1,first); pst.setString(2,last); pst.executeUpdate(); } catch(Exception e) { System.out.println("Exception:"+e); } } }

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  • Passing two variables to separate table...associations problem

    - by bgadoci
    I have developed an application and I seem to be having some problems with my associations. I have the following: class User < ActiveRecord::Base acts_as_authentic has_many :questions, :dependent => :destroy has_many :sites , :dependent => :destroy end Questions class Question < ActiveRecord::Base has_many :sites, :dependent => :destroy has_many :notes, :through => :sites belongs_to :user end Sites (think of this as answers to questions) class Site < ActiveRecord::Base acts_as_voteable :vote_counter => true belongs_to :question belongs_to :user has_many :notes, :dependent => :destroy has_many :likes, :dependent => :destroy has_attached_file :photo, :styles => { :small => "250x250>" } validates_presence_of :name, :description end When a Site (answer) is created I am successfully passing the question_id to the Sites table but I can't figure out how to also pass the user_id. Here is my SitesController#create def create @question = Question.find(params[:question_id]) @site = @question.sites.create!(params[:site]) respond_to do |format| format.html { redirect_to(@question) } format.js end end

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  • Need to format character precedence in Strings.

    - by Christian
    I'm currently writing a Roman Numeral Converter for the fun of it. The problem works up to the aforementioned character precedence. Since Roman Numerals are not positional, i.e. III does not symbolize 1*whatever base^2 + 1*whatever base^1 + 1*whatever base^0. That of course makes it hard when somebody types in XIV and I need to make sure that the I is not added in this case, but rather subtracted. I'm not sure how to do this. What would be the best approach to tackle this? I have both the Roman Symbols and their respective decimal numbers stored in arrays: const char cRomanArray[] = "IVXLCDM"; const int romanArray[] = { 1, 5, 10, 50, 100, 500, 1000 }; so it wouldn't be too hard for me to brute-force the damn thing by simply checking the precedence within the array, i.e. if the symbol is smaller than the next symbol, i.e. in the exampe 'XIV' if 'I' is smaller than 'V', in which case it would be because I have ordered them in the array, then I could make it subtract the value instead of add. But this seems like a very ugly solution. Are there perhaps any better ones? I was thinking something along the lines of Regular Expressions maybe( forgive me if that sounds like a horrible idea, I haven't used RegExp yet, but it sounds like it could do what I need, and that's to determine the characters in a string.)

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  • Multiple user roles in Ruby on Rails

    - by aguynamedloren
    I am building an inventory management application with four different user types: admin, employee, manufacturer, transporter. I haven't started coding yet, but this is what I'm thinking.. Manufacturers and transporters are related with has_many :through many-to-many association with products as follows: class Manufacturer < ActiveRecord::Base has_many :products has_many :transporters, :through => :products end class Product < ActiveRecord::Base belongs_to :manufacturer belongs_to :transporter end class Transporter < ActiveRecord::Base has_many :products has_many :manufacturers, :through => :products end All four user types will be able to login, but they will have different permissions and views, etc. I don't think I can put them in the same table (Users), however, because they will have different requirements, ie: vendors and manufacturers must have a billing address and contact info (through validations), but admins and employees should not have these fields. If possible, I would like to have a single login screen as opposed to 4 different screens. I'm not asking for the exact code to build this, but I'm having trouble determining the best way to make it happen. Any ideas would be greatly appreciated - thanks!

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  • mod_rewrite/GoDaddy problem

    - by John Deerhake
    Ok, so I really don't know much about mod_rewrite and I'm looking over the apache docs and still not figuring this out. Here is my htaccess (which is mostly just copy & pasted from a site I found): .htaccess in base dir: <IfModule mod_rewrite.c> RewriteEngine on RewriteRule ^$ public/ [L] RewriteRule (.*) public/$1 [L] </IfModule> .htaccess in /public dir: <IfModule mod_rewrite.c> RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.*)$ index.php?url=$1 [PT,L] </IfModule> Basically I'm using the above htaccess files on my current test server and it works great and exactly like I would expect (everything gets seamlessly redirected to public dir). Now when I throw this on my GoDaddy hosting account i get "Internal Server Errror". I've done some searching and I'm fairly certain I should be able to use mod_rewrite with GoDaddy. I suspect this is because I'm not using the base directory to host the site in. The site is in in the folder html/myapp/ (where html is the base directory) and i have a subdomain set up in GoDaddy to look in that folder.

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  • Asp net aspx page and webcontrol issue

    - by Josemalive
    Hello, I have a class that inherits from Page, called APage. public abstract class APage: Page { protected Repeater ExampleRepeater; .... protected override void OnLoad(EventArgs e) { if (null != ExampleRepeater) { ExampleRepeater.DataSource = GetData(); ExampleRepeater.DataBind(); } base.OnLoad(e); } } For other hand i have an aspx page called Default that inherits from this APage: public partial class Default : APage { } on the design part of this Default page, i have a repeater: <asp:Repeater ID="ExampleRepeater" runat="server"> <ItemTemplate> <%# DataBinder.Eval(Container.DataItem, "Name") %><br/> </ItemTemplate> </asp:Repeater> This repeater is datasourced at the base APage load event, but at this level this web control is null. Do you have any idea why the control is null in the base page? Thanks in advance. Best Regards. Jose.

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  • Should this even be a has_many :through association?

    - by GoodGets
    A Post belongs_to a User, and a User has_many Posts. A Post also belongs_to a Topic, and a Topic has_many Posts. class User < ActiveRecord::Base has_many :posts end class Topic < ActiveRecord::Base has_many :posts end class Post < ActiveRecord::Base belongs_to :user belongs_to :topic end Well, that's pretty simple and very easy to set up, but when I display a Topic, I not only want all of the Posts for that Topic, but also the user_name and the user_photo of the User that made that Post. However, those attributes are stored in the User model and not tied to the Topic. So how would I go about setting that up? Maybe it can already be called since the Post model has two foreign keys, one for the User and one for the Topic? Or, maybe this is some sort of "one-way" has_many through assiociation. Like the Post would be the join model, and a Topic would has_many :users, :through = :posts. But the reverse of this is not true. Like a User does NOT has_many :topics. So would this even need to be has_many :though association? I guess I'm just a little confused on what the controller would look like to call both the Post and the User of that Post for a give Topic. Edit: Seriously, thank you to all that weighed in. I chose tal's answer because I used his code for my controller; however, I could have just as easily chosen either j.'s or tim's instead. Thank you both as well. This was so damn simple to implement, and I think today marks the day that I'm beginning to fall in love with rails.

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  • C# Help: Adding a complexType to the main XmlSchema

    - by G33kKahuna
    I need to create program that creates a XML schema like below using System.Xml.XmlSchema namespace I'm using the XmlSchemaComplexType to MyString and MyInteger but I can't seem to find a way to set the extension to base string and int respectively. Any guidance is much appreciated ... thanks <?xml version="1.0" encoding="utf-8" ?> <xs:schema elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:complexType name="MyString"> <xs:simpleContent> <xs:extension base="xs:string"> <xs:attribute name="modified" type="xs:boolean" /> </xs:extension> </xs:simpleContent> </xs:complexType> <xs:complexType name="MyInteger"> <xs:simpleContent> <xs:extension base="xs:int"> <xs:attribute name="modified" type="xs:boolean" /> </xs:extension> </xs:simpleContent> </xs:complexType> <xs:element name="data"> <xs:complexType> <xs:sequence> <xs:element name="row"> <xs:complexType> <xs:sequence> <xs:element name="order_id" type="MyInteger" /> <xs:element name="order_status" type="MyString" /> </xs:sequence> </xs:complexType> </xs:element> </xs:sequence> </xs:complexType> </xs:element> </xs:schema>

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  • Best way to enforce inter-table constraints inside database

    - by FerranB
    I looking for the best way to check for inter-table constraints an step forward of foreing keys. For instance, to check if a date child record value is between a range date on two parent rows columns. For instance: Parent table ID DATE_MIN DATE_MAX ----- ---------- ---------- 1 01/01/2009 01/03/2009 ... Child table PARENT_ID DATE ---------- ---------- 1 01/02/2009 1 01/12/2009 <--- HAVE TO FAIL! ... I see two approaches: Create materialized views on-commit as shown in this article (or other equivalent on other RDBMS). Use stored-procedures and triggers. Any other approach? Which is the best option? UPDATE: The motivation of this question is not about "putting the constraints on database or on application". I think this is a tired question and anyone does the way she loves. And, I'm sorry for detractors, I'm developing with constraints on database. From here, the question is "which is the best option to manage inter-table constraints on database?". I'm added "inside database" on the question title. UPDATE 2: Some one added the "oracle" tag. Of course materialized views are oracle-tools but I'm interested on any option regardless it's on oracle or others RDBMSs.

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  • Where does django look for sqlite3 installation/libraries?

    - by gath
    Am having a bit of a problem making my django application run in SUSE linux 9. I have Python2.5 installed well, Django 1.0 installed well. Am able to execute django command django-admin startproject fine But when i run the runserver command i get the error below. i have a folder with sqlite3, i can go in there and actually run the sqlite3* application, now am wondering where does Django look for the sqlite libraries? and how can i fix this? Validating models... Unhandled exception in thread started by <function inner_run at 0x2a96cb4f50> Traceback (most recent call last): File "/usr/local/lib/python2.5/site-packages/django/core/management/commands/runserver.py", line 48, in inner_run self.validate(display_num_errors=True) File "/usr/local/lib/python2.5/site-packages/django/core/management/base.py", line 122, in validate num_errors = get_validation_errors(s, app) File "/usr/local/lib/python2.5/site-packages/django/core/management/validation.py", line 22, in get_validation_errors from django.db import models, connection File "/usr/local/lib/python2.5/site-packages/django/db/__init__.py", line 16, in <module> backend = __import__('%s%s.base' % (_import_path, settings.DATABASE_ENGINE), {}, {}, ['']) File "/usr/local/lib/python2.5/site-packages/django/db/backends/sqlite3/base.py", line 27, in <module> raise ImproperlyConfigured, "Error loading %s module: %s" % (module, exc) django.core.exceptions.ImproperlyConfigured: Error loading sqlite3 module: No module named _sqlite3 Gath

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  • Updating extra attributes in a has_many, :through relationship using Rails

    - by Robbie
    I've managed to set up a many-to-many relationship between the following models Characters Skills PlayerSkills PlayerSkills, right now, has an attribute that Skills don't normally have: a level. The models look something like this (edited for conciseness): class PlayerSkill < ActiveRecord::Base belongs_to :character belongs_to :skill end class Skill < ActiveRecord::Base has_many :player_skills has_many :characters, :through => :player_skills attr_accessible :name, :description end class Character < ActiveRecord::Base belongs_to :user has_many :player_skills has_many :skills, :through => :player_skills end So nothing too fancy in the models... The controller is also very basic at this point... it's pretty much a stock update action. The form I'm looking to modify is characters#edit. Right now it renders a series of checkboxes which add/remove skills from the characters. This is great, but the whole point of using has_many :through was to track a "level" as well. Here is what I have so far: - form_for @character do |f| = f.error_messages %p = f.label :name %br = f.text_field :name %p = f.label :race %br = f.text_field :race %p = f.label :char_class %br = f.text_field :char_class %p - @skills.each do |skill| = check_box_tag "character[skill_ids][]", skill.id, @character.skills.include?(skill) =h skill.name %br %p = f.submit After it renders "skill.name", I need it to print a text_field that updates player_skill. The problem, of course, is that player_skill may or may not exist! (Depending on if the box was already ticked when you loaded the form!) From everything I've read, has_many :through is great because it allows you to treat the relationship itself as an entity... but I'm completely at a loss as to how to handle the entity in this form. As always, thanks in advance for any and all help you can give me!

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  • Can a destructor be recursive?

    - by Cubbi
    Is this program well-defined, and if not, why exactly? #include <iostream> #include <new> struct X { int cnt; X (int i) : cnt(i) {} ~X() { std::cout << "destructor called, cnt=" << cnt << std::endl; if ( cnt-- > 0 ) this->X::~X(); // explicit recursive call to dtor } }; int main() { char* buf = new char[sizeof(X)]; X* p = new(buf) X(7); p->X::~X(); // explicit call to dtor delete[] buf; } My reasoning: although invoking a destructor twice is undefined behavior, per 12.4/14, what it says exactly is this: the behavior is undefined if the destructor is invoked for an object whose lifetime has ended Which does not seem to prohibit recursive calls. While the destructor for an object is executing, the object's lifetime has not yet ended, thus it's not UB to invoke the destructor again. On the other hand, 12.4/6 says: After executing the body [...] a destructor for class X calls the destructors for X's direct members, the destructors for X's direct base classes [...] which means that after the return from a recursive invocation of a destructor, all member and base class destructors will have been called, and calling them again when returning to the previous level of recursion would be UB. Therefore, a class with no base and only POD members can have a recursive destructor without UB. Am I right?

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  • Creating a class Hierarchy for Atoms,neutrons,protons,chemical reationc

    - by Smart Zulu
    I need help to create a program that can show the hierarchy of any Atoms and its components (neutrons,protons,electrons,and chemical reaction) Here is a code of what i have done so far,being a novice at the subject using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Atoms { public class Atoms { protected string name = "Sodium"; protected string element ="Metal"; public virtual void GetInfo() { Console.WriteLine("name: {0}",name); Console.WriteLine("element: {0}", element); } } class Proton : Atoms { public int number = 11 ; public override void GetInfo() { base.GetInfo(); Console.WriteLine("Proton number: {0}",number); } } class Electron : Atoms { public int number = 11; public override void GetInfo() { base.GetInfo(); Console.WriteLine("Electron number: {0}", number); } class Neutrons : Atoms { public int number = 12; public override void GetInfo() { base.GetInfo(); Console.WriteLine("Neutron number: {0}", number); } class TestClass { static void Main() { Proton P = new Proton(); P.GetInfo(); Neutrons N = new Neutrons(); N.GetInfo(); Electron E = new Electron(); E.GetInfo(); Console.WriteLine("click any key to exit"); Console.ReadLine(); } } } } }

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  • rails HABTM versus view (formtastic)

    - by VP
    I have two models: The model NetworkObject try to describe "hosts". I want to have a rule with source and destination, so i'm trying to use both objects from the same class since it dont makes sense to create two different classes. class NetworkObject < ActiveRecord::Base attr_accessible :ip, :netmask, :name has_many :statements has_many :rules, :through =>:statements end class Rule < ActiveRecord::Base attr_accessible :active, :destination_ids, :source_ids has_many :statements has_many :sources, :through=> :statements, :source=> :network_object has_many :destinations, :through => :statements, :source=> :network_object end To build the HABTM i did choose the Model JOIN. so in this case i created a model named Statement with: class Statement < ActiveRecord::Base attr_accessible :source_id, :rule_id, :destination_id belongs_to :network_object, :foreign_key => :source_id belongs_to :network_object, :foreign_key => :destination_id belongs_to :rule end The problem is: is right to add two belongs_to to the same class using different foreign_keys? I tried all combinations like: belongs_to :sources, :class_name => :network_object, :foreign_key => :source_id but no success.. anything that i am doing wrong?

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