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  • NHibernate: QueryOver<> help

    - by Andy Baker
    Hi, I'm just starting out with NHibernate and I'm having trouble with running more complex queries. I have entities with a list of tags attached. The user will provide two lists of tags, include and exclude. I need to find all the entities that have all of the include tags, and exclude any entites that have any tag in the exclude list. Below is my first effort- which is clearly wrong as its listing all Display objects that have any of the include tags rather than all! Any assistance is greatly appeciated. var includeTagIds = (from tag in regime.IncludeTags select tag.Id).ToList<int>(); var excludeTagIds = from tag in regime.ExcludeTags select tag.Id; var displays = session.QueryOver<Display>() .JoinQueryOver<DisplayTag>(display => display.Tags) .WhereRestrictionOn(tag => tag.Id) .IsIn(includeTagIds).List().Distinct(); return displays.ToList();

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  • Django ORM: Ordering w/ aggregate functions — None special treatment

    - by deno
    Hi, I'm doing query like that: SomeObject.objects.annotate(something=Avg('something')).order_by(something).all() Now, I normally have an aggregate field in my model that I use with Django signals to keep in sync, however in this case perfomance isn't an issue so I thought I'd keep it simple and just use subqueries. This approach, however, presented an unexpected issue: It all works grate if aggregate function results are like this: [5.0, 4.0, 6.0 … (etc, just numbers)] However if you mix in some Nones than it's being ordered like this: [None, 5.0, 4.0 …] The issue is that None has higher value than any number, while it should have value at most of 0. I'm using PostgreSQL and haven't tested w/ other DBs. I haven't actually checked what query is generated etc. I worked it around by just sorting in memory: sorted(…, key=lambda _:_.avg_rating if _.avg_rating is not None else 0) So I'm just curious if you know a way to do it w/ just Django ORM. Perhaps .where? or something… Kind regards

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  • Problem using SQLDMO/Vb6 against SQL2008

    - by E.J. Brennan
    I have a client, that uses SQLDMO for a portion of a custom application that was written against SQL 2000, and they recently upgraded to SQL2008. The majority of the app still runs fine (doesn't use SQLDMO), but the admin functions which rely on SQLDMO stopped working. I installed the SQL2005 backward compatibility pack, and now SQLDMO partially works, i.e. I can run "select" type queries, but any "Update" queries fail with the error message: to connect to the server you must use SQL Server management studio or sql server management objects (SMO) Any thoughts? Should the backward compatibility pack give me ALL the functionality back, or is this a known issue? BTW: I realize SQLDMO has been deprecated and will go away next release, none-the-less I need to do what I can to solve the problem at hand.

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  • new[n] and delete every location with delete instead the whole chunk with delete[]

    - by pmr
    Is this valid C++ (e.g. not invoking UB) and does it achieve what I want without leaking memory? valgrinds complains about mismatching free and delete but says "no leaks are possible" in the end. int main() { int* a = new int[5]; for(int i = 0; i < 5; ++i) a[i] = i; for(int i = 0; i < 5; ++i) delete &a[i]; } The reason I'm asking: I have a class that uses boost::intrusive::list and I new every object that is added to that list. Sometimes I know how many objects I want to add to the list and was thinking about using new[] to allocate a chunk and still be able to delete every object on its own with the Disposer-style of boost::intrusive.

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  • heroku corrupted object, git fsck fails in rails

    - by Ryan Max
    Hello. I am trying to push an app to heroku and I am getting the error detailed here. So I am trying to determine the corrupt objects using git fsck -full but it isn't returning anything. Nothing happens: Ryan@Ryan-PC ~ $ git fsck --full Ryan@Ryan-PC But I get the object error when I try to push the object to heroku. Is there anyway I can go about repairing the corrupt repository, or can I just delete it and start over? How do I go about doing this?

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  • WCF Data Services consuming data from EF based repository

    - by John Kattenhorn
    We have an existing repository which is based on EF4 / POCO and is working well. We want to add a service layer using WCF Data Services and looking for some best practice advice. So far we have developed a class which has a IQueryable property and the getter triggers the repository 'get all users' method. The problem so far have been two-fold: 1) It required us to decorate the ID field of the poco object to tell data service what field was the id. This now means that our POCO object is not 'pure'. 2) It cannot figure out the relationships between the objects (which is obvious i guess). I've now stopped this approach and i'm thinking that maybe we should expose the OBjectContext from the repository and use more 'automatic' functionality of EF. Has anybody got any advice or examples of using the repository pattern with WCF Data Services ?

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  • Flash CS4 AS3 Security Sandbox Violation

    - by Jennifer Heidelberg
    Hi, I have build my entire website with flash and embedded several swf objects (slideshows) into it. everything always worked fine when I published it as swf movie. but now that I want to upload my website an error message occurs saying: Error #2044: Unhandled SecurityErrorEvent:. text=Error #2140: Security sandbox violation: file:///mylayout.swf cannot load file:///slideshow_1.swf. Local-with-filesystem and local-with-networking SWF files cannot load each other. I know that it has something to do with the fact that one of the swf is local with filesystem and the other local with networking. but in my publish settings i told it to access local files only. but it didnt help. does anyone have an answer?

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  • Django CMS malfunction: Site matching query does not exist

    - by culebrón
    I've installed all apps in a project, then added a site in the sites section, and deleted example.com. Now Pages section in Django CMS 2.0 isn't working: it raises a DoesNotExist exception: Site matching query does not exist. at http://127.0.0.1:8000/admin/cms/page/ The section worked normally before I deleted the example.com site. In settings.py I have SITE_ID = 2 line. Still, in this call: return Site.objects.get(pk=site_pk) in traceback, site_pk=1. How can I fix this?

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  • System.Web.Security.FormsAuthentication.Encrypt returns null

    - by Mustafakidd
    I'm trying to encrypt some userData to create my own custom IPrincipal and IIdentity objects using Forms authentication - I've serialized an object representing my logged in user to Json and created my FormsAuthentication ticket like so: string user_item = GetJsonOfLoggedinUser();/*get JSON representation of my logged in user*/ System.Web.Security.FormsAuthenticationTicket ticket = new System.Web.Security.FormsAuthenticationTicket(1, WAM.Utilities.SessionHelper.LoggedInEmployee.F_NAME + " " + WAM.Utilities.SessionHelper.LoggedInEmployee.L_NAME, DateTime.Now, DateTime.Now.AddMinutes(30), false, user_item); string encrypted_ticket = System.Web.Security.FormsAuthentication.Encrypt(ticket); HttpCookie auth_cookie = new HttpCookie( System.Web.Security.FormsAuthentication.FormsCookieName, encrypted_ticket); Response.Cookies.Add(auth_cookie); However, the string encrypted_ticket is always null. Is there a limit on the length of the user_item string? Thanks Mustafa

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  • Trace not working in a .NET DLL loaded from VB6 EXE

    - by Luis
    Hello I have a .NET DLL that writes to the Trace. But seems that when I call my DLL from a VB6 EXE the trace is not working. I have created an myApp.config file in the EXE folder with the trace configuration, but this does not solves the issue. I've also tried creating the Trace objects in code,but doesn't work: Dim _traceSrc as TraceSource= New TraceSource("myTraceSorce") Dim flListener As FileLogTraceListener = New FileLogTraceListener("myFileLogTraceListener") Dim tSwitch As SourceSwitch = New SourceSwitch("mySwitch") tSwitch.Level = _logLevel If I call my DLL from a .NET EXE it works, even if I dont have the app.config in the EXE folder, becusase I set it in code if the config is not found. Thanks

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  • Can VS2010 help me find memory leaks?

    - by Andrew Garrison
    I'm going through the pain right now of finding memory leaks in my application using WinDbg. Luckily, I've found a few good articles that give a very good step-by-step process of how to do it. Still, it is a fairly painful process. Does VS2010 have any built in features that can ease the burden of finding a memory leak in a Silverlight application? Of course, a memory leak in .NET sounds a bit like a misnomer, but what I intend to do is to find all objects that are still referencing an object that I believe should be garbage collected. For those that may be interested, here are some good articles on how to get started using WinDbg to find memory leaks in Silverlight: Finding Memory Leaks In Silverlight With WinDbg Hunting down memory leaks in Silverlight

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  • Generate unique hashes for django models

    - by becomingGuru
    I want to use unique hashes for each model rather than ids. I implemented the following function to use it across the board easily. import random,hashlib from base64 import urlsafe_b64encode def set_unique_random_value(model_object,field_name='hash_uuid',length=5,use_sha=True,urlencode=False): while 1: uuid_number = str(random.random())[2:] uuid = hashlib.sha256(uuid_number).hexdigest() if use_sha else uuid_number uuid = uuid[:length] if urlencode: uuid = urlsafe_b64encode(uuid)[:-1] hash_id_dict = {field_name:uuid} try: model_object.__class__.objects.get(**hash_id_dict) except model_object.__class__.DoesNotExist: setattr(model_object,field_name,uuid) return I'm seeking feedback, how else could I do it? How can I improve it? What is good bad and ugly about it?

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  • Annotating axis in ggplot2

    - by mpiktas
    I am looking for the way to annotate axis in ggplot2. The example of the problem can be found here: http://learnr.wordpress.com/2009/09/24/ggplot2-back-to-back-bar-charts. The y axis of the chart (example graph in the link) has an annotation: (million euro). Is there a way to create such types of annotations in ggplot2? Looking at the documentation there is no obvious way, since the ggplot does not explicitly let you put objects outside plotting area. But maybe there is some workaround? One of the possible workarounds I thought about is using scales: data=data.frame(x=1:10,y=1:10) qplot(x=x,y=y,data=data)+scale_y_continuous(breaks=10.1,label="Millions") But then how do I remove the tick? And it seems that since ggplot does not support multiple scales, I will need to grab the output of the scale_y_continuous, when it calculates the scales automaticaly and then add my custom break and label by hand. Maybe there is a better way?

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  • Do WPF ComboBox SelectedIndex and SelectedValue have different behavior on SelectionChanged event?

    - by Junior Mayhé
    Hello guys I got this cbxJobPosition_SelectionChanged firing as expected. The problem is when a external method tries to set cbxJobPosition. cbxJobPosition is databinded with a list of objects of type JobPosition: JobPositionID: 1, JobPositionName: Manager JobPositionID: 2, JobPositionName: Employee JobPositionID: 3, JobPositionName: Third party Here's the XAML: <ComboBox Cursor="Hand" DataContext="{Binding}" ItemsSource="{Binding}" FontSize="13" Name="cbxJobPosition" SelectedValuePath="JobPositionID" DisplayMemberPath="JobPositionName" SelectedIndex="0" Width="233" Height="23" SelectionChanged="cbxJobPosition_SelectionChanged" /> On UserControl_Loaded method, it reads from database the list of jobs and try to set the specific job position "Third party": //calls cbxJobPosition_SelectionChanged and passes the correct SelectedValue within cbxJobPosition.SelectedIndex = 3; //calls cbxJobPosition_SelectionChanged and but won't pass the correct SelectedValue within cbxJobPosition.SelectedValue = "3"; As you can notice, when the processing is automatically redirected to cbxJobPosition_SelectionChanged, the SelectedValue attribute will have different values for each statement above when you're debugging within cbxJobPosition_SelectionChanged event. Does anyone know if this difference is expected, am I missing something or it could be a bug?

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  • How to get markers after calling drive directions in Google Maps API?

    - by Ivan Rocha
    Hi all, I just started working using Google Maps API yesterday, and trying to set up drive directions to my map. My problem is: when I call the function load, [...] gdir = new GDirections(map, directionsPanel); [...] gdir.load("from: " + fromAddress + " to: " + toAddress); it returns a map whose markers are not draggable. So, I need to make them draggable in order to recalculate the directions, but I can't get the markers objects. Someone knows how can I do it? Thanks, Ivan.

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  • Composite Key Dictionary

    - by AaronLS
    I have some objects in List, let's say List<MyClass> and MyClass has several properties. I would like to create an index of the list based on 3 properties of of MyClass. In this case 2 of the properties are int's, and one property is a datetime. Basically I would like to be able to do something like: Dictionary< CompositeKey , MyClass > MyClassListIndex = Dictionary< CompositeKey , MyClass >(); //Populate dictionary with items from the List<MyClass> MyClassList MyClass aMyClass = Dicitonary[(keyTripletHere)]; I sometimes create multiple dictionaries on a list to index different properties of the classes it holds. I am not sure how best to handle composite keys though. I considered doing a checksum of the three values but this runs the risk of collisions.

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  • WPF - Dispatcher PushFrame()

    - by Tri Q
    Hello, I'm trying to call Dispatcher.PushFrame() from several different thread but encounter an error: Must create DependencySource on same Thread as the DependencyObject. Here is a code snippet: _lockFrame = new DispatcherFrame(true); Dispatcher.PushFrame(_lockFrame); When I tried: Dispatcher.CurrentDispatcher.Invoke( DispatcherPriority.Normal, new Action(() => _lockFrame = new DispatcherFrame(true)); Dispatcher.PushFrame(_lockFrame); I get the error: Objects must be created by the same thread. What is the approach for pushing multiple frames into the Dispatcher from different threads?

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  • Nested class or not nested class?

    - by eriks
    I have class A and list of A objects. A has a function f that should be executed every X seconds (for the first instance every 1 second, for the seconds instance every 5 seconds, etc.). I have a scheduler class that is responsible to execute the functions at the correct time. What i thought to do is to create a new class, ATime, that will hold ptr to A instance and the time A::f should be executed. The scheduler will hold a min priority queue of Atime. Do you think it is the correct implementation? Should ATime be a nested class of the scheduler?

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  • Silverlight DataGrid set cell IsReadOnly programatically

    - by Brandon Montgomery
    I am binding a data grid to a collection of Task objects. A particular column needs some special rules pertaining to editing: <!--Percent Complete--> <data:DataGridTextColumn Header="%" ElementStyle="{StaticResource RightAlignStyle}" Binding="{Binding PercentComplete, Mode=TwoWay, Converter={StaticResource PercentConverter}}" /> What I want to do is set the IsReadOnly property only for each task's percent complete cell based on a property on the actual Task object. I've tried this: <!--Percent Complete--> <data:DataGridTextColumn Header="%" ElementStyle="{StaticResource RightAlignStyle}" Binding="{Binding PercentComplete, Mode=TwoWay, Converter={StaticResource PercentConverter}}" IsReadOnly={Binding IsNotLocalID} /> but apparently you can't bind to the IsReadOnly property on a data grid column. What is the best way do to do what I am trying to do?

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  • Loading FireMonkey style resourses with RTTI

    - by HeMet
    I am trying to write class that inherits from FMX TStyledControl. When style is updated it loads style resource objects to cache. I created project group for package with custom controls and test FMX HD project as it describes in Delphi help. After installing package and placing TsgSlideHost on the test form I run test app. It’s work well, but when I close it and try to rebuild package RAD Studio says “Error in rtl160.bpl” or “invalid pointer operation”. It seems what problem in LoadToCacheIfNeeded procedure from TsgStyledControl, but I’m not understand why. Is there any restriction on using RTTI with FMX styles or anything? TsgStyledControl sources: unit SlideGUI.TsgStyledControl; interface uses System.SysUtils, System.Classes, System.Types, FMX.Types, FMX.Layouts, FMX.Objects, FMX.Effects, System.UITypes, FMX.Ani, System.Rtti, System.TypInfo; type TCachedAttribute = class(TCustomAttribute) private fStyleName: string; public constructor Create(const aStyleName: string); property StyleName: string read fStyleName; end; TsgStyledControl = class(TStyledControl) private procedure CacheStyleObjects; procedure LoadToCacheIfNeeded(aField: TRttiField); protected function FindStyleResourceAs<T: class>(const AStyleLookup: string): T; function GetStyleName: string; virtual; abstract; function GetStyleObject: TControl; override; public procedure ApplyStyle; override; published { Published declarations } end; implementation { TsgStyledControl } procedure TsgStyledControl.ApplyStyle; begin inherited; CacheStyleObjects; end; procedure TsgStyledControl.CacheStyleObjects; var ctx: TRttiContext; typ: TRttiType; fld: TRttiField; begin ctx := TRttiContext.Create; try typ := ctx.GetType(Self.ClassType); for fld in typ.GetFields do LoadFromCacheIfNeeded(fld); finally ctx.Free end; end; function TsgStyledControl.FindStyleResourceAs<T>(const AStyleLookup: string): T; var fmxObj: TFmxObject; begin fmxObj := FindStyleResource(AStyleLookup); if Assigned(fmxObj) and (fmxObj is T) then Result := fmxObj as T else Result := nil; end; function TsgStyledControl.GetStyleObject: TControl; var S: TResourceStream; begin if (FStyleLookup = '') then begin if FindRCData(HInstance, GetStyleName) then begin S := TResourceStream.Create(HInstance, GetStyleName, RT_RCDATA); try Result := TControl(CreateObjectFromStream(nil, S)); Exit; finally S.Free; end; end; end; Result := inherited GetStyleObject; end; procedure TsgStyledControl.LoadToCacheIfNeeded(aField: TRttiField); var attr: TCustomAttribute; styleName: string; styleObj: TFmxObject; val: TValue; begin for attr in aField.GetAttributes do begin if attr is TCachedAttribute then begin styleName := TCachedAttribute(attr).StyleName; if styleName <> '' then begin styleObj := FindStyleResource(styleName); val := TValue.From<TFmxObject>(styleObj); aField.SetValue(Self, val); end; end; end; end; { TCachedAttribute } constructor TCachedAttribute.Create(const aStyleName: string); begin fStyleName := aStyleName; end; end. Using of TsgStyledControl: type TsgSlideHost = class(TsgStyledControl) private [TCached('SlideHost')] fSlideHost: TLayout; [TCached('SideMenu')] fSideMenuLyt: TLayout; [TCached('SlideContainer')] fSlideContainer: TLayout; fSideMenu: IsgSideMenu; procedure ReapplyProps; procedure SetSideMenu(const Value: IsgSideMenu); protected function GetStyleName: string; override; function GetStyleObject: TControl; override; procedure UpdateSideMenuLyt; public constructor Create(AOwner: TComponent); override; procedure ApplyStyle; override; published property SideMenu: IsgSideMenu read fSideMenu write SetSideMenu; end;

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  • Batch select with SQLAlchemy

    - by muckabout
    I have a large set of values V, some of which are likely to exist in a table T. I would like to insert into the table those which are not yet inserted. So far I have the code: for value in values: s = self.conn.execute(mytable.__table__.select(mytable.value == value)).first() if not s: to_insert.append(value) I feel like this is running slower than it should. I have a few related questions: Is there a way to construct a select statement such that you provide a list (in this case, 'values') to which sqlalchemy responds with records which match that list? Is this code overly expensive in constructing select objects? Is there a way to construct a single select statement, then parameterize at execution time?

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  • Delphi and Microsoft ATL security issue

    - by Jens Nordenbro
    My impression is that standard Delphi uses the Win32 API. Recently Microsoft has been communicating a problem regarding ATL that requires application developers to rebuild ATL-using applications after installing an update on their machines. Will this practice be the general case also for Delphi developers, or are they in the clear with the exception of Delphi code using third party ATL COM objects? Sources: Microsoft Security: Protect your computer from the Active Template Library (ATL) security vulnerability MSDN VC++ DevCenter: Active Template Library Security Update for Developers Microsoft Security Advisory (973882): Vulnerabilities in Microsoft Active Template Library (ATL) Could Allow Remote Code Execution Microsoft Security Bulletin MS09-034 - Critical: Cumulative Security Update for Internet Explorer (972260) Microsoft Security Bulletin MS09-035 - Moderate: Vulnerabilities in Visual Studio Active Template Library Could Allow Remote Code Execution (969706)

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  • Django: making raw SQL query, passing multiple/repeated params?

    - by AP257
    Hopefully this should be a fairly straightforward question, I just don't know enough about Python and Django to answer it. I've got a raw SQL query in Django that takes six different parameters, the first two of which (centreLat and centreLng) are each repeated: query = "SELECT units, (SQRT(((lat-%s)*(lat-%s)) + ((lng-%s)*(lng-%s)))) AS distance FROM places WHERE lat<%s AND lat>%s AND lon<%s AND lon>%s ORDER BY distance;" params = [centreLat,centreLng,swLat,neLat,swLng,neLng] places = Place.objects.raw(query, params) How do I structure the params object and the query string so they know which parameters to repeat and where?

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  • Django: UserProfile with Unique Foreign Key in Django Admin

    - by lazerscience
    Hi, I have extended Django's User Model using a custom user profile called UserExtension. It is related to User through a unique ForeignKey Relationship, which enables me to edit it in the admin in an inline form! I'm using a signal to create a new profile for every new user: def create_user_profile(sender, instance, created, **kwargs): if created: try: profile, created = UserExtension.objects.get_or_create(user=instance) except: pass post_save.connect(create_user_profile, sender=User) (as described here for example: http://stackoverflow.com/questions/44109/extending-the-user-model-with-custom-fields-in-django) The problem is, that, if I create a new user through the admin, I get an IntegritiyError on saving "column user_id is not unique". It doesnt seem that the signal is called twice, but i guess the admin is trying to save the profile AFTERWARDS? But I need the creation through signal if I create a new user in other parts of the system!

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  • Mutable class as a child of an immutable class

    - by deamon
    I want to have immutable Java objects like this (strongly simplyfied): class Immutable { protected String name; public Immutable(String name) { this.name = name; } public String getName() { return name; } } In some cases the object should not only be readable but mutable, so I could add mutability through inheritance: public class Mutable extends Immutable { public Mutable(String name) { super(name); } public void setName(String name) { super.name = name; } } While this is technically fine, I wonder if it conforms with OOP and inheritance that mutable is also of type immutable. I want to avoid the OOP crime to throw UnsupportedOperationException for immutable object, like the Java collections API does. What do you think? Any other ideas?

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