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• Repository vs Data Access

  - by vdh_ant

  Hi guys In the context of the n-tier application, is there a difference between what you would consider your data access classes to be and your repositories? I tend to think yes but I just wanted to see what other thought. My thinking is that the job of the repository is just to contain and execute the raw query itself, where as the data access class would create the context, execute the repository (passing in the context), handle mapping the data model to the domain model and return the result back up... What do you guys think? Also do you see any of this changing in a Linq to XML scenario (assuming that you change the context for the relevant XDocument)? Cheers Anthony

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• In VisualStudio 2008, emacs mode - how can you enable "overwrite"?

  - by Abby Fichtner

  Using VisualStudio 2008, have emacs keyboard mapping scheme enabled. If I select text and try to paste over it, it INSERTS the new text, rather than replacing it. Also, if I select text and hit DELETE it deletes the first character AFTER the selected text (just as if I didn't have any text selected). Does anyone know how to fix this so that I get the standard windows behavior. That is: If I select text and try to paste over it, it replaces the selected text with what I pasted in. If I select text and hit the DELETE key, it actually deletes the text I have selected Thanks! Abby

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• Use Automapper to flatten sub-class of property

  - by Neil

  Given the classes: public class Person { public string Name { get; set; } } public class Student : Person { public int StudentId { get; set; } } public class Source { public Person Person { get; set; } } public class Dest { public string PersonName { get; set; } public int? PersonStudentId { get; set; } } I want to use Automapper to map Source - Dest. This test obviously fails: Mapper.CreateMap<Source, Dest>(); var source = new Source() { Person = new Student(){ Name = "J", StudentId = 5 }}; var dest = Mapper.Map<Source, Dest>(source); Assert.AreEqual(5, dest.PersonStudentId); What would be the best approach to mapping this given that "Person" is actually a heavily used data-type throughout our domain model.

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• Get all related products based on their full-text search relationship

  - by MikeJ

  I have a Product table with the fields Id, Title, Description, Keywords (just comma separated list of keywords). Table is full-text indexed. When I view one product, I do a query and search the full-text catalog for any related products based on the Keywords field. select * from Products where Contains(Products.*, @keywordsFromOneProduct) Works like a charm. Now I would like to list all products and all their related products in a big list and I want to avoid calling this method for each item. Any ideas how could I do it? I was thinking about a job that would go through products one by one and build a one-many mapping table (fields ProductId, RelatedProductId), but I wonder is there a better way?

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• feature extraction from acoustic signals

  - by Dolphin

  Hi everyone, It's been a while. I found APIs in Java for extracting features from acoustic audio files and symbolic files separately. But now I have a problem in mapping from low level wav audio features to high level midi features. i.e. I need to write the extracted wav audio features on to midi format. But I cannot think of anything even close to it. Can someone pls provide me some insight as in how I can approach this. Greatly appreciate your responses. Advance thanks

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• T-SQL: Build Nested Set From Parent-Child Relationship

  - by Peder Rice

  I have a table that stores my Customer hierarchy with a nested set (due to the specific design of the application, I wasn't able to leverage just a Customer/Parent Customer mapping table). To simplify maintenance of this table, I've built a couple of stored procedures to handle moving nodes around and creating new nodes, but it's significantly more work than maintaining a Customer/Parent Customer table. Further, these structures are very fragile. So I'm looking for a way to have a Customer/Parent Customer table and then convert that table to a nested set on demand. Does anyone have a link to such an implementation?

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• Can i Automap a tree heirarchy with fluent nhibernate?

  - by NakChak

  Is it possible to auto map a simple nested object structure? Something like this public class Employee : Entity { public Employee() { this.Manages = new List<Employee>(); } public virtual string FirstName { get; set; } public virtual string LastName { get; set; } public virtual bool IsLineManager { get; set; } public virtual Employee Manager { get; set; } public virtual IList<Employee> Manages { get; set; } } Causes the following error at run time: Repeated column in mapping for collection: SharpKtulu.Core.Employee.Manages column: EmployeeFk Is it possible to automap this sort of structure, or do i have over ride the auto mapper for this sort of structure?

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• VIM comma is missing in insert mode

  - by Tamás Szelei

  Hi folks, I'm a VIM beginner, and I have a weird problem. I started using vim in a terminal emulator, but today I moved to gVim. Then I realized that I cannot write a comma in Insert mode! I tried :map ,, :imap , both said no mapping found. THen I tried :nomap , and :inomap , both without any luck. As writing the commands, I am able to write the comma, but not in insert mode. What can be the problem? Some details: I'm running a freshly installed ubuntu 9.04 system, with an english keyboard, but using a hungarian layout. I am able to write a comma in vim when writing into the "command line" of vim, after pressing : in command mode.

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• Loading tables dynamically with NHibernate

  - by Trevor Goertzen

  I'm working on a project that requires me to load tables based on table names stored in another table. More tables will be added to the DB (and by someone else), so creating NHibernate mapping files for each table isn't an option. Does anyone know if it is possible to load tables dynamically using NHibernate? Edit: I should add that I'm on .NET 2.0, so I can't use Fluent NHibernate. Thanks for the suggestion though guys. I will use that as evidence in convincing my associates to upgrade.

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• Redirect www.example.com/apple to food.example.com/fruits/apple

  - by Senthil

  I want to redirect users from www.example.com/apple to http://food.example.com/fruits/apple Note: This is a hardcoded redirection. Even a mapping if you will. "apple" will not be substituted with anything else. Nothing in the two URLs will change except for the domain of course. So there is no need for a regular expression to match the "apple" or anything else. There is already dozens of RewriteCond and RewriteRule things in the .htaccess file. I do not want them to be affected. This redirection is independent of those. I have access to the .htaccess file at the root of www.example.com and the httpd.conf What code should I put in .htaccess in order to achieve this? Or should I change the httpd.conf?

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• NHibernate filters don't work with Session.Get

  - by Khash

  I'm trying to implement a Soft-deletable repository. Usually this can be easily done with a Delete Event listener. To filter out the deleted entities, I can add a Where attribute to my class mapping. However, I also need to implement two more methods in the repository for this entity: Restore and Purge. Restore will "undelete" entities and Purge will hard-delete them. This means I can't use Where attribute (since it block out soft-deleted entities to any access) I tried using filters instead. I can create a filter and enable or disable it within session to achieve the same result. But the problem is filters don't have any effect on Session.Get method (they only affect ICriteria based access). Any ideas as to how solve this problem? Thanks

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• 3G/Edge/GPRS IP addresses and geocoding

  - by LookitsPuck

  Hey all! So, we're looking to develop a mobile website. On this mobile website, we'd like to automatically populate a user's location (with proper fallback) based on their IP address. I'm aware of geocoding a location based on IP address (mapping to latitude, longitude and then getting the location with that information). However, I'm curious how accurate this information is? Are mobile devices assigned IP's when they utilize 3G, EDGE, and GPRS connections? I think so. If that is so, does it map to a relatively accurate location? It doesn't have to be spot on, but relatively accurate would be nice. Thanks! -Steve

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• Why would the assignment operator ever do something different than its matching constructor?

  - by Neil G

  I was reading some boost code, and came across this: inline sparse_vector &assign_temporary(sparse_vector &v) { swap(v); return *this; } template<class AE> inline sparse_vector &operator=(const sparse_vector<AE> &ae) { self_type temporary(ae); return assign_temporary(temporary); } It seems to be mapping all of the constructors to assignment operators. Great. But why did C++ ever opt to make them do different things? All I can think of is scoped_ptr?

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• How to disable JSR-303 Hibernate Validation in Spring3

  - by Pinchy

  After putting hibernate-validator.jar and javax.validation-api.jar in my classpath the org.springframework.dao.DataIntegrityViolationException is replaced by org.hibernate.exception.ConstraintViolationException and this is causing a lot of issues. I have to put this two jars to be able to upgrade Jersey to 2.4, it has dependency on these two jars. Putting these properties into hibernate.properties file doesn't help, hibernate simply ignores them but it loads the properties on start-up loaded properties from resource hibernate.properties: {hibernate.validator.apply_to_ddl=false,hibernate.validator.autoregister_listeners=false etc} javax.persistence.validation.mode=none hibernate.validator.autoregister_listeners=false hibernate.validator.apply_to_ddl=false I am using Spring 3.2.4 with SessionFactory and mapping resources from hbm.xml files with constraints in it, hibernate 3.6.9.final, hibernate-validator 5.0.final, javax.validator-api 1.1.0.Final I just can't figure out how to disable hibernate validation, any help will be much appreciated.

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• Entity framework, adding custom entity to diagram

  - by molgan

  Hello I'm using the entity framework that comes with 3.5sp1, and I'm trying to add a custom entity that I will propulate with searchresults from a stored procedure. But I have problems with the designer....... when I pick "Add + Entity" and give it a name, and hit save, the whole diagram stops working...... blah entities namespace could not be found..... all the other entities have lost its reference or summet. Works when I add a "table" to it that exists in database. But when custom it screws everything up. How should I fix this? I've imported the function, I just need to add an entity for it... I've read http://blogs.microsoft.co.il/blogs/gilf/archive/2009/03/13/mapping-stored-procedure-results-to-a-custom-entity-in-entity-framework.aspx but I cant get to step 3 since of all the errors when saving on step 2. /M

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• Mixing table per subclass and per hierarchy in hibernate

  - by Xelluloid

  In my database there are two three tables. The first one, table ABSTRACT, holds three columns id, type, someText This table contains all abstract information for the abstract class abstract. Now the two tables CONCRETEONE and CONCRETETWO contain all information for the concrete classes concreteOne and concreteTwo. Now I know I could use the table per subclass strategy from hibernate to create a mapping with inheritance. But as I have a column that marks the type of the concrete implementation could it be possible to create some mixed behaviour like a table per subclass strategy with an discriminator?

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• What is the relationship between IRimTable and PersistenceStore?

  - by Martin

  The BlackBerry Desktop API has the interface IRimTable which apparently maps an "application database" on a BlackBerry device to a virtual structure (i.e, IRimTable has IRimRecords, each of which has IRimField) that developer can browse the handheld device data when it is connected to a desktop computer. Meanwhile, applications in the handheld device can store its data in PersistenceStore databases. The point where I'm stuck is the PersistenceStore API doesn't define any Table or Records or Fields. Does anybody knows what is the relationship between these two classes? And how does the mapping work (if at all) ?

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• SQL - Two foreign keys that have a dependency between them

  - by Brian

  The current structure is as follows: Table RowType: RowTypeID Table RowSubType: RowSubTypeID FK_RowTypeID Table ColumnDef: FK_RowTypeID FK_RowSubTypeID (nullable) In short, I'm mapping column definitions to rows. In some cases, those rows have subtype(s), which will have column definitions specific to them. Alternatively, I could hang those column definitions that are specific to subtypes off their own table, or I could combine the data in RowType and RowSubType into one table and work with a single ID, but I'm not sure either is a better solution (if anything, I'd lean towards the latter, as we mostly end up pulling ColumnDefs for a given RowType/RowSubType). Is the current design SQL Blasphemy? If I keep the current structuree, how do I maintain that if RowSubTypeID is specified in ColumnDef, that it must correspond to the RowType specified by RowTypeID? Should I try to enforce this with a trigger or am I missing a simple redesign that would solve the problem?

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• Is it valid for Hibernate list() to return duplicates?

  - by skaffman

  Is anyone aware of the validity of Hibernate's Criteria.list() and Query.list() methods returning multiple occurrences of the same entity? Occasionally I find when using the Criteria API, that changing the default fetch strategy in my class mapping definition (from "select" to "join") can sometimes affect how many references to the same entity can appear in the resulting output of list(), and I'm unsure whether to treat this as a bug or not. The javadoc does not define it, it simply says "The list of matched query results." (thanks guys). If this is expected and normal behaviour, then I can de-dup the list myself, that's not a problem, but if it's a bug, then I would prefer to avoid it, rather than de-dup the results and try to ignore it. Anyone got any experience of this?

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• Using Sculpture with NHibernate or Entity Framework

  - by Sergei

  I recently ran across this open-source project: http://www.codeplex.com/Sculpture Sculpture is a code-generator which allows you to design your domain model and then use persistence 'molds' such as NHibernate/EF and probably more to generate repositories. It takes care of all the mapping and Data access generation. It looks like it does a heck of a lot more, but i'm pretty much sold at this point. However, i would like to know if anyone here used this for real-world solutions. If so, how well does it scale? How did the generated DAL work for you?

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• OCL constraints intended prevent node creation in an GMF generated editor only makes it invisible

  - by TheMorph

  Hello, I am working on editors created with GMF and struggling with OCL right now. Is there a possibilty to prevent a node to be created if an OCL statement in the mapping evaluates to false? If tried adding an OCL statement to a node and all it does is making the node not visible in the editor, but it is created. There is also an OCL statement in the ecore file, but this way it is only evaluated when there should be something done with the created model. I does not prevent a user to construct an invalid model but this is what I intend to prevent. Thanks in advance, Morph

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• How to use OCL constraints to prevent node creation in an GMF generated editor

  - by TheMorph

  Hello, I am working on editors created with GMF and struggling with OCL right now. Is there a possibilty to prevent a node to be created if an OCL statement in the mapping evaluates to false? If tried adding an OCL statement to a node and all it does is making the node not visible in the editor, but it is created. There is also an OCL statement in the ecore file, but this way it is only evaluated when there should be something done with the created model. I does not prevent a user to construct an invalid model but this is what I intend to prevent. Thanks in advance, Morph

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• empty() not a valid callback?

  - by user151841

  I'm trying to use empty() in array mapping in php. I'm getting errors that it's not a valid callback. $ cat test.php <? $arrays = array( 'arrEmpty' => array( '','','' ), ); foreach ( $arrays as $key => $array ) { echo $key . "\n"; echo array_reduce( $array, "empty" ); var_dump( array_map("empty", $array) ); echo "\n\n"; } $ php test.php arrEmpty Warning: array_reduce(): The second argument, 'empty', should be a valid callback in /var/www/authentication_class/test.php on line 12 Warning: array_map(): The first argument, 'empty', should be either NULL or a valid callback in /var/www/authentication_class/test.php on line 13 NULL Shouldn't this work? Long story: I'm trying to be (too?) clever and checking that all array values are not empty strings.

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• Exclude some parameters with POST request on RestKit

  - by Mike Meyers

  I've just integrated RestKit with a Mac application for communicating with a web service. After much confusion, I have successfully got requests and responses working using it. The problem I am now finding is that when I want to make a POST request. I have created a RKRequestDescriptor with a mapping for a whole number of properties and all of the properties are being sent as parameters for the query. I want a way of dynamically changing the parameters that are sent, for example not sending some parameters where the property is nil. Is this possible as part of the built-in functionality of RestKit? And if so, how?

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• Struts Tiles application

  - by rav83

  Am trying a tiles application.Below is my code tiles-defs.xml </tiles-definitions> <definition name="${YOUR_DEFINITION_HERE}"> </definition> <definition name="commonPage" path="/jsps/template.jsp"> <put name="header" value="/jsps/header.jsp" /> <put name="menu" value="/jsps/menu.jsp" /> <put name="body" value="/jsps/homebody.jsp" /> <put name="footer" value="/jsps/footer.jsp" /> </definition> <definition name="aboutUsPage" extends="commonPage"> <put name="body" value="/jsps/aboutUsBody.jsp" /> </definition> </tiles-definitions> struts-config.xml <action path="/aboutus" type="java.com.mbest.core.action.AboutUsAction" parameter="method"> <forward name="success" path="aboutUsPage"/> <forward name="failure" path="aboutUsPage"/> </action> </action-mappings> template.jsp <%@ taglib uri="/WEB-INF/struts-tiles.tld" prefix="tiles" %> <html> <head><title></title></head> <body> <table border="1" cellspacing="0" cellpadding="0" style="width: 98%; height: 100%"> <tr> <td colspan="2"> <tiles:insert attribute="header"/> </td> </tr> <tr style="height: 500px"> <td valign="top" style="width: 200px"> <tiles:insert attribute="menu"/> </td> <td valign="baseline" align="left"> <tiles:insert attribute="body"/> </tr> <tr> <td colspan="2"> <tiles:insert attribute="footer"/> </td> </tr> </table> </body> </html> homebody.jsp <%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %> <%@taglib uri="/WEB-INF/struts-html.tld" prefix="html"%> <%@taglib uri="/WEB-INF/struts-tiles.tld" prefix="tiles" %> <html> <head> <title></title> <style type="text/css"> <%@include file="../css/helper.css"%> <%@include file="../css/dropdown.css" %> <%@include file="../css/default.ultimate.css" %> </style> </head> <body> <div id="header"> <ul id="nav" class="dropdown dropdown-horizontal"> <li><span class="dir"><html:link page="/aboutus.do?method=aboutUsPage" >About Us</html:link></span></li> <li><span class="dir"><a href="./">Products</a></span></li> <li><span class="dir"><a href="./">Infrastructure</a></span></li> <li><span class="dir"><a href="./">Pharmaceutical Formulations</a></span></li> <li><span class="dir"><a href="./">Contact Us</a></span></li> </ul> </div> </body> </html> AboutUsAction.java package java.com.mindbest.core.action; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import org.apache.struts.actions.DispatchAction; public class AboutUsAction extends DispatchAction { public ActionForward aboutUsPage(ActionMapping mapping,ActionForm form, HttpServletRequest request,HttpServletResponse response)throws Exception { return mapping.findForward("success"); } } aboutUsBody.jsp hello In my above code if i try to access the app using (domainname)/example/aboutus.do its giving 500 error.Can anyone help me figure this out?

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