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• Multiple join query in eSql

  - by Syma

  Hi guys, This is my first question in stackoverflow but really not the first time to get solution here. I am struggling with multiple join in entity framework 4. I have three tables (Accounts, Users and AccountUsers) that am finding difficult to query. What I want is to get all the users for the provided accountId including the account creator. I can get all the account users with no problem but the hard side for me is getting the account creator since it's not added to AccountUsers table. below is a quick preview how the tables are related. Accounts AccountId UserId (account creator) ...other columns Users UserId ...other columns AccountUsers AccountId UserId I would prefer the query to be esql, but Linq to Entities will do. I trust you guys on stackoverflow, so I know this won't take long to get the 'Answer' mark. Thanks for even reading.

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• How would I best address this object type heirachy? Some kind of enum heirarchy?

  - by FerretallicA

  I'm curious as to any solutions out there for addressing object heirarchies in an ORM approach (in this instance, using Entity Framework 4). I'm working through some docs on EF4 and trying to apply it to a simple inventory tracking program. The possible types for inventory to fall into are as follows: INVENTORY ITEM TYPES: Hardware PC Desktop Server Laptop Accessory Input (keyboards, scanners etc) Output (monitors, printers etc) Storage (USB sticks, tape drives etc) Communication (network cards, routers etc) Software What recommendations are there for handling enums in a situation like this? Are enums even the solution? I don't really want to have a ridiculously normalised database for such a relatively simple experiment (eg tables for InventoryType, InventorySubtype, InventoryTypeToSubtype etc). I don't really want to over-complicate my data model with each subtype being inherited even though no additional properties or methods are included (except PC types which would ideally have associated accessories and software but that's probably out of scope here). It feels like there should be a really simple, elegant solution to this but I can't put my finger on it. Any assistance or input appreciated!

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• Recommendation for web-based database visualization tool

  - by prometheus

  Tableau is extremely flexible when it comes to visualizing and playing around with datasets, but it is extremely slow when you go into "production mode" and publish a particular view that you've created onto your server. Does anyone know of any tools that can be used to connect to a database, present interactive (or somewhat interactive) dashboards, and perform reasonably well when published to a server? To be clearer, I am looking for something like this -- http://www.corda.com/executive-dashboard-graph-styles.php. I realize that such a product might not exist. If so, is there a particular framework or library that I could use to create killer interactive visualizations of data for the web?

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• Localization as an afterthought-- screwed?

  - by David

  So I signed on with a startup web development company as a subcontractor. They are putting together a large, complex user/product management system for a company that needs to support multiple levels of hierarchial localization. I signed a 3 month contract, and upon looking at their code, wish I hadn't. They opted to write their own MVC framework (I guess the client company didn't want to use a prewritten one) and it's extremely poorly written. There's SQL scattered throughout almost every model view and controller (and there's no parameter-based find methods, it's all SQL) and they haven't even THOUGHT about localization yet-- something that will have an affect on nearly EVERY query. The due date is 4 months away, and I honestly think we'd make good progress by scrapping the whole thing and going with CakePHP. Have any of you been in a similar situation, and what did you do? PS: This is written in PHP/MySQL.

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• How to convert an EntityCollection<T> to List<POCOObj>

  - by ggomez

  I have Entity Framework entities Events which have an EntityCollection of RSVP. I want to convert the EntityCollection of RSVP to a generic List< of a POCO class RSVP. So I want EntityCollection - List. What would be the best way to go about achieving this? So far I have this (it's missing the RSVP part) var events = from e in _entities.Event.Include("RSVP") select new BizObjects.Event { EventId = e.EventId, Name = e.Name, Location = e.Location, Organizer = e.Organizer, StartDate = e.StartDate, EndDate = e.EndDate, Description = e.Description, CreatedBy = e.CreatedBy, CreatedOn = e.CreatedOn, ModifiedBy = e.ModifiedBy, ModifiedOn = e.ModifiedOn, RSVPs = ??? }; Thanks.

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• many-to-many, poco, ef4

  - by Lari13

  I have 3 entities: Goods [GID(PK), GoodName] Persons [PID(PK), PersonName] Roles [RID(PK), RoleName] But now I need to associate these object with each other. In other words, each Good can have MANY Persons in MANY Roles. For example: Book (GID#1), can have 3 associated persons: 1. Jack (PID#1) in role Author (RID#1) 2. Jack (PID#1) in role Editor (RID#2) 3. Bill (PID#2) in role Painter (RID#3) How can it be done in POCO format in Entity Framework 4?

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• How do I Relate these 4 Tables

  - by Baddie

  Trying to setup a simple Thread/Poll table mapping. Here is what I have: Threads table ThreadID (Primary Key/Identity Column) Polls table PollID (Primary Key, FK for ThreadID for one-to-one relation) Question PollOptions table PollOptionID (Identity/Primary Key) Text PollID PollVotes table PollVoteID (Primary Key/Identity) PollOptionID I'm not sure if this is a proper relationship. It seems wrong but I'm not sure whats wrong with it. A Thread can have 0 or 1 Poll. A Poll can have 2 or more PollOptions. A PollOption can have 0 or many PollVotes. I'm going to be using Entity Framework and before I generate the code for it (VS 2010, .NET 4) I want to make sure I have the proper relationship mapping.

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• how to create a watcher using fsevents in mac osx 10.6

  - by mathan

  I m trying to get file event notifications using fsevents.h file. I m working with Mac OS X 10.6 and XCode 3.1.4 in which i found fsevents.h in four following locations /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonCore.framework/Versions/A/Headers/FSEvents.h /Xcode3.1.4/SDKs/MacOSX10.5.sdk/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonCore.framework/Versions/A/Headers /Developer/SDKs/MacOSX10.5.sdk/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonCore.framework/Versions/A/Headers /Developer/SDKs/MacOSX10.6.sdk/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonCore.framework/Versions/A/Headers I have following issues in accessing fsevents.h 1) Out of above four locations which one should be included since fsevents is not getting included unless i put following include syntax include<../../../../Developer/SDKs/MacOSX10.6.sdk/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonCore.framework/Versions/A/Headers/fsevents.h 2) Where could I find the function definition whose prototypes are declared in fsevents.h using "extern" keyword

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• HTTP vs FTP upload

  - by Richard Knop

  I am building a large website where members will be allowed to upload content (images, videos) up to 20MB of size (maybe a little less like 15MB, we haven't settled on a final upload limit yet but it will be somewhere between 10-25MB). My question is, should I go with HTTP or FTP upload in this case. Bear in mind that 80-90% of uploads will be smaller size like cca 1-3MB but from time to time some members will also want to upload large files (10MB+). Is HTTP uploading reliable enough for such large files or should I go with FTP? Is there a noticeable speed difference between HTTP and FTP while uploading files? I am asking because I'm using Zend Framework which already has HTTP adapter for file uploads, in case I choose FTP I would have to write my own adapter for it. Thanks!

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• error 2016: Condition cannot be specified for Column member

  - by IP

  I am having some issues with Entity Framework in VS2010 The problem I'm getting is described very well here... http://social.msdn.microsoft.com/Forums/en/adonetefx/thread/cacf6a76-09a8-4c90-9502-d8b87c2f6bea It's basically happening when a Foreign key is pointed at the primary key of another table...but if I take off the StoreGeneratedPattern as "Identity", then it tries to insert a value into the identity field ** EDIT So, what it seems to be is that EF4 can't handle a null relationship when the primary key is set to StoreGeneratedPattern="Identity". If I create a FK pointing to this primary key, and make it nullable (effectively creating a 0...M relationship), then it throws this compilation error. Removing StoreGeneratedPattern="Identity" fixes the issue, but causes issues elseware It works if the foreign key is set to not nullable

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• CommunicationException in WCF

  - by user343159

  Hi I have a problem with a WCF Service I've just created. This was working yesterday but for some reason it's just stopped working. One of my WCF methods returns an array of an Entity Framework entity, like this: public BranchContactDetail[] GetClosestBranches(string postcode, int howManyBranches) { GeoLocation geoLocation = GetLocationFromPostcode(postcode); Location location = new Location(geoLocation.Latitude, geoLocation.Longitude); using (BranchDirectoryEntities entities = new BranchDirectoryEntities()) { var branchesInOrder = entities.BranchContactDetails .Where(b => b.latitude.HasValue && b.longitude.HasValue ) .OrderBy(b => location.DistanceFrom(b.latitude, b.longitude)) .Take(howManyBranches) .ToArray(); return branchesInOrder; } } ...and, as I say, this was working fine yesterday. Now I'm getting a "The underlying connection was closed: The connection was closed unexpectedly." I've hunted all over the web but no-one seems to know the answer. Anyone shed any light on this issue? Regards, Mark

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• PredicateBuilder "And" Method not working

  - by mikemurf22

  I have downloaded the predicate builder and am having a difficult time getting it to work with the entity framework. Here is my code: v_OrderDetail is the entity var context = new OrdersEntities(); Expression<Func<v_OrderDetail,bool>> whereClause = w => true; var predicate = PredicateBuilder.True<v_OrderDetail>(); predicate.And(w => w.Status == "Work"); var results = context.v_OrderDetail.AsExpandable().Where(predicate); When I look at the results I get back every order. The And predicate doesn't seem to take. When I look at the predicate.parameters.count it only shows 1. I'm not sure, but I would expect it to show 2 after I add the second one. Any help is greatly appreciated.

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• Are Symphony and CakePHP too slow to be usable?

  - by Aziz Light

  Until now, I have always said that CakePHP is too bloated and slow. I don't really know that, I just saw "some" benchmarks. What I really want to know, is that if those two frameworks (Symfony and CakePHP) are too slow to be usable in a way that the user will get frustrated. I already know that those frameworks are slower than other alternatives, but that's not the question. I ask the question because I want to create a project management web application and I still hesitate between a couple frameworks. I've had some trouble learning Zend, but imho I haven't tried hard enough. So in conclusion, in addition to the first question above, I would like to ask another question: If I want to create a project management tool (which is a pretty big project), which of the following should you suggest, considering the developement time, the speed of the resulting application, and the robustness of the final product: Symphony CakePHP Zend Framework Also I should mention that I don't know any of those frameworks, and that I want to learn one of them (at least).

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• problem in return value from server to client in ajax

  - by user1400

  hello i try to use ajax and zend framework in my application , i could pass variable to server but i can not get data from server , it does not return values, it return all html code page, where is my mistake? $('#myForm').submit(function($e){ $e.preventDefault(); var $paramToServer=$("#myForm").serialize(); $.ajax({ type:'POST', url:'test', data:$paramToServer , success:function(re){ var res = $.evalJSON(re); console.log(res.id); // to see in firebog }, dataType:'json' }); }); public function testAction() { $this->_helper->getHelper('viewRenderer')->setNoRender(); //disable layout Zend_Layout::getMvcInstance()->disableLayout(); $name=$this->getRequest()->getParam ( 'name' ); //pass $name to server $return = array( 'id' => '5', 'family' => 'hello ', ); $return = Zend_Json::encode( $return); // Response $this->getResponse()->setBody($return); }

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• Entity Fremework serialization

  - by Alexandr

  Hello guys! I was confused with my problem. I'm using Entity Framework and want to save entities on hard disk and then to restore them. I have no problem with Serializing/Deserializing but i get an exception "The object cannot be added to the ObjectStateManager because it already has an EntityKey. Use ObjectContext.Attach to attach an object that has an existing key" when i try to add deserialized object to my datacontext. And nothing happens when i just Attach my entity to datacontext How to achieve my goal? Thx in advance! -Alexandr-

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• How do I echo the number of items in an array?

  - by Joel

  A total newbie question I know. I'm sing Zend framework, and sending an array from the controller: $this->view->googleArray = $viewFeedArray; In the view, I have a foreach loop that is populating a table with the array contents. <?php foreach($this->googleArray as $row) { ?> <tr> <td><?php echo $row['when']; ?></td> ... ... </tr> <?php } ?> It all works fine. At the top of the table, I want to list the number of items in the array. Something like (which doesn't work): <?php echo $this->googleArray->totalResults; ?> event(s) found How would I do that? Thanks!

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• EF problem with entity re-ordering and uniqueness constraint

  - by wpfwannabe

  I am using Entity Framework and I've come to an interesting stumbling block. Let's say there is a db table "Item" with "sequence" column of type int (and others of course). Column "sequence" must be unique and it is used for (re)ordering of items. EF maps this table to "Item" class with "sequence" int property. Now let's say I want to swap position of two items by mutually exchanging each other's sequence number. Upon calling SaveChanges() EF throws an exception complaining about "sequence" uniqueness. It probably generates two UPDATEs and the first one probably fails. I assume that plain SQL solution to this issue is using a third UPDATE to introduce a unique sequence value in the process but I am stuck with EF. Any thoughts?

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• How to keep history of record updates in MySQL?

  - by Proxium

  I have to create a code in PHP that will allow me to keep the history of record updates in MySQL database so I can find by date an old revision. Here is the example of what I actualy want to achive: http://en.wikipedia.org/w/index.php?title=Tunisia&action=history The data are mostly Numbers that we record about the company for generating reports and to extract indices. I plan to use codeigniter for it's simplicity and I'm looking for idea about a framework or an opensource project that use the same approche to keep history of modifications in the database.

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• Using persistent and non-persistent connection together in a PHP MySQL app

  - by cappuccino

  There are parts of my app where a persistent connection is required, in particular the parts where every hour maybe 30,000 select requests are made by many different users, this is causing my mysql server to max out on the 100 connection limit, and i really don't want to increase it since 100 connections already seems like alot. So for the parts of the application where reading and selecting is the case I want to switch to persistent connections. The other parts where data is being modified is usually done through a transaction, and the general rule is never to use persistent connections for transactions according to the php documentation. So I would like to keep this on non-persistent connections. My question is, am i able to use persistent and non-persistent connections together in the same app, the same script etc? I am using PHP 5.2+, MySQL 5+ (InnoDB tables) and the Zend Framework 10.6+

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• How to implement following with Zend navigation?

  - by simple

  I have a top navigation and a side one Home | Tours | Booking Tour1 ------ Tour2 ------ Tour3 I show the side menu depending on a active top item. But sometimes when the side menu item is clicked I have to show that items children instead of the sidemenu. When no children exist I just show Children of a top menu depending on the active item. I an really having difficulties implementing that kind a logic and any help would be appreciated. //Comment button is not working so I will add comments here After stumbling the zend navigation view helpers, I am coming to the point - Understanding the concept of how in zend V part of MVC is implemented can save someone who is new to the framework many hours. As said in the answer to this question - "Use what is available", thought first we have to know where to find what is already available out there - that is where comes handy to take a look at the concept of helpers and so forth.

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• How can I create a web based administration interface.

  - by The HCD

  Hi all, I'm planning to create a simple web based interface that stores administration input in json format (for use later by an applicaiton running on the same host) example json output is here: http://www.json.org/example.html The content would be user contacts (email, name, phone number, photo etc..) There would need to be a conf file per logged in user. and an administrator user for viewing all config files in his group. I'm wondering what technology is best to create this framework. I could do it via servlets etc.. however, there may be something simpler.. Thanks to all for your replies in advance.

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• Why are those modules being loaded in an ASP.NET project (not website)

  - by petergmagid

  I have an ASP.NET 3.5 Project (not website) and I don't understand why all these modules are being created and loaded. I thought that with a web project it would all compile to a single .DLL 'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\reviewstat_20\c147e006\64781866\App_Web_fwtnlvuq.dll', Symbols loaded. 'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\reviewstat_20\c147e006\64781866\App_Web_vb8hmtmg.dll', Symbols loaded. 'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\reviewstat_20\c147e006\64781866\App_Web_v-nkuwgl.dll', Symbols loaded. 'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\reviewstat_20\c147e006\64781866\App_Web_wn_uucrw.dll', Symbols loaded. 'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\reviewstat_20\c147e006\64781866\App_Web_ngd_8nhu.dll', Symbols loaded. 'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\reviewstat_20\c147e006\64781866\App_Web_8keebrhe.dll', Symbols loaded. 'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\reviewstat_20\c147e006\64781866\App_Web_ohg9e50r.dll', Symbols loaded. 'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\reviewstat_20\c147e006\64781866\App_Web_yhmgvhum.dll', Symbols loaded. 'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\reviewstat_20\c147e006\64781866\App_Web_4qltywkk.dll', Symbols loaded. 'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\reviewstat_20\c147e006\64781866\App_Web_1nml5ezc.dll', Symbols loaded. 'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\reviewstat_20\c147e006\64781866\App_Web_cdju8bdk.dll', Symbols loaded. 'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\reviewstat_20\c147e006\64781866\App_Web_xhugloto.dll', Symbols loaded. 'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\reviewstat_20\c147e006\64781866\App_Web_rkqqzc0u.dll', Symbols loaded. 'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\reviewstat_20\c147e006\64781866\App_Web_-vfyn7ik.dll', Symbols loaded. 'WebDev.WebServer.EXE' (Managed): Loaded 'C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\reviewstat_20\c147e006\64781866\App_Web_cthyzgij.dll', Symbols loaded.

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• C# CF: How to open specific file extension with my program

  - by nuttynibbles

  Hi, Im developing a mobile application in dot net Compact framework. I managed to edit the registry HKEY_CLASSES_ROOT so that a click on file with .xyz extension will open my application. basically, i need to do some operation on this file when it's clicked. however, i realise that if i do that the first time, it reaches program.cs at static void Main. but when the program is running and i click on the file with .xyz extension again, it doesnt loads the program static void Main. i tried setting breakpoints at the form that is currently running but still nothing. so where does it go to? how can i detect file .xyz is clicked and do something??

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• What 'best practices' exist for handing enum heirarchies?

  - by FerretallicA

  I'm curious as to any solutions out there for addressing enum heirarchies. I'm working through some docs on Entity Framework 4 and trying to apply it to a simple inventory tracking program. The possible types for inventory to fall into are as follows: INVENTORY ITEM TYPES: Hardware PC Desktop Server Laptop Accessory Input (keyboards, scanners etc) Output (monitors, printers etc) Storage (USB sticks, tape drives etc) Communication (network cards, routers etc) Software What recommendations are there for handling enums in a situation like this? Are enums even the solution? I don't really want to have a ridiculously normalised database for such a relatively simple experiment (eg tables for InventoryType, InventorySubtype, InventoryTypeToSubtype etc). I don't really want to over-complicate my data model with each subtype being inherited even though no additional properties or methods are included (except PC types which would ideally have associated accessories and software but that's probably out of scope here). It feels like there should be a really simple, elegant solution to this but I can't put my finger on it. Any assistance or input appreciated!

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• Where to execute extra logic for linq to entities query?

  - by Inez

  Let say that I want to populate a list of CustomerViewModel which are built based on Customer Entity Framework model with some fields (like Balance) calculated separately. Below I have code which works for lists - it is implemented in my service layer, but also I want to execute this code when I just get one item from the database and execute is as well in different services where I'm accessing Customers data as well. How should I do this to ensure performance but to to not duplicate code - the one for calculating Balance? public List<CustomerViewModel> GetCustomerViewModelList() { IQueryable<CustomerViewModel> list = from k in _customerRepository.List() select new CustomerViewModel { Id = k.Id, Name = k.Name, Balance = k.Event.Where(z => z.EventType == (int) EventTypes.Income).Sum(z => z.Amount) }; return list.ToList(); }

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