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• Appengine backreferences - need composite index?

  - by davezor

  I have a query that is very recently starting to throw: "The built-in indices are not efficient enough for this query and your data. Please add a composite index for this query." I checked the line on which this exception is being thrown, and the problem query is this one: count = self.vote_set.filter("direction =", 1).count() This is literally a one-filter operation using appengine's built-in backreferences. I have no idea how to optimize this query...anyone have any suggestions? I tried to add this index: - kind: Vote properties: - name: direction direction: desc - kind: Vote properties: - name: direction And I got a message (obviously) saying this was an unnecessary index. Thanks for your help in advance.

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• Access sub-class object

  - by Amit

  There is a main class containing 2 sub-class(with some prop). If I create an obj of main class, will have access to sub-Class as well b/c we have property defined in main class. Is thr any way where I pass Main class.SubClass name then it will return that object only ? can we use indexer ? MainClass obj = new MainClass(); obj.SubClass1 or obj.SubClass2 ??? Thanks in adv... class MainClass { SubClass1 objSubclass1 = null; SubClass2 objSubclass2 = null; public MainClass() { objSubclass1 = new SubClass1(); objSubclass2 = new SubClass2(); } public SubClass1 SubClass1 {get {return objSubclass1;} } public SubClass2 SubClass2 {get {return objSubclass2;} } } Class SubClass1 { Some properties here... } Class SubClass2 { Some properties here... }

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• Help with a algorithm in linq to resolve a query

  - by Deumber

  I have been some time thinking how to resolve this problem, but out of ideas i prefer expose it for help. I have 2 tables (linq to sql) A and B, A have a many relation with B, so A have a property EntitySet of B A have the following properties: CreateDate (Datetime) ModificateDate (Datetime) Bs (EntitySet<B>) B have the following properties: CreateDate (Datetime) ModificateDate (Datetime) All that i want is return a ordered collection of A by the Max date between : A.CreateDate, A.ModificateDate, The Max B.CreateDate of all B in A The Max B.ModificateDate of all B in A if i someone need a little example, just ask for it.

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• looping through object property names in actionscript

  - by asawilliams

  I have a dynamic class that I have created public dynamic class SiteZoneFileUploadVO { public var destination:String = "sitezone"; public var siteZoneId:uint; public var fileType:String; public var fileContents:String; public function SiteZoneFileUploadVO() { } } when I try to iterate over this object's property names it only iterates the dynamically added properties. parameters.dynVar= "value"; for(var name:String in parameters) { trace(name); } Even though the object has all the properties equal to a value (ive checked this in the debugger) the only property name that will be traced is dynVar. How can I iterate over all the property names and not just the dynamically added ones?

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• How to buld selective Projects within a Solution in TS 2008 in Team Build?

  - by Steve Johnson

  Hi all. I have a solution the source Control (TFS 2008) with multiple projects. Some of the projects are independent of each other. I dont want to build the complete solution instead sometimes we need to build some of the projects. I am a total newbie in Team Build. Please help how i can use the <SolutionToBuild Include="$(BuildProjectFolderPath)/../../Development/Main/Build-Development.sln"> <Targets></Targets> <Properties></Properties> </SolutionToBuild> to select only some of the projects from the solution. Kindly give a detailed answer for me as i am absolutely clueless about it. Thanks

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• naming a method - using set() when *not* setting a property?

  - by user151841

  Is setX() method name appropriate for only for setting class property X? For instance, I have a class where the output is a string of an html table. Before you can you can call getTable, you have to call setTable(), which just looks at a other properties and decides how to construct the table. It doesn't actually directly set any class property -- only causes the property to be set. When it's called, the class will construct strHtmlTable, but you can't specify it. So, calling it setTable breaks the convention of get and set being interfaces for class properties. Is there another naming convention for this kind of method? Edit: in this particular class, there are at least two ( and in total 8 optional ) other methods that must be called before the class knows everything it needs to to construct the table. I chose to have the data set as separate methods rather than clutter up the __construct() with 8 optional parameters which I'll never remember the order of.

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• app engine's back referencing is too slow. How can I make it faster?

  - by Ray Yun

  Google app engine has smart feature named back references and I usually iterate them where the traditional SQL's computed column need to be used. Just imagine that need to accumulate specific force's total hp. class Force(db.Model): hp = db.IntegerProperty() class UnitGroup(db.Model): force = db.ReferenceProperty(reference_class=Force,collection_name="groups") hp = db.IntegerProperty() class Unit(db.Model): group = db.ReferenceProperty(reference_class=UnitGroup,collection_name="units") hp = db.IntegerProperty() When I code like following, it was horribly slow (almost 3s) with 20 forces with single group - single unit. (I guess back-referencing force reload sub entities. Am I right?) def get_hp(self): hp = 0 for group in self.groups: group_hp = 0 for unit in group.units: group_hp += unit.hp hp += group_hp return hp How can I optimize this code? Please consider that there are more properties should be computed for each force/unit-groups and I don't want to save these collective properties to each entities. :)

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• OpenGL in Visual studio - Issues with GLEW

  - by BalsamicVinegar

  I'm currently following the openglbook.com tutorials (set up) (Tutorial) and have run into an issue fairly early on. I'm getting the following two errors: 1>main.obj : error LNK2019: unresolved external symbol __imp__glewGetErrorString@4 referenced in function _Initialize 1>main.obj : error LNK2019: unresolved external symbol __imp__glewInit@0 referenced in function _Initialize I have downloaded and compiled freeglut 2.8.0 as well as the glew 1.9.0 binaries. I have copied the libs and includes to C:\Program Files (x86)\Microsoft SDKs\Windows\v6.0A\Lib and Include respectively. The Lib and Include paths have also been added to my project properties under Additional Library/Include directories. I have also defined glew32.lib and freeglut.lib in my linker-Input-Additional dependencies. I have included and at the top of my main file. What am I missing? Every other thread I've found has been solved by adding the directories to the project properties. Does anyone have any ideas?

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• Java classpath and config file

  - by user1228291

  I'm having some trouble finding a config file with classpath. I use : InputStream stream = myclass.class.getResourceAsStream("properties.file"); The properties.file is located under config directory. When running the program with eclipse, it works. I just added config folder in the classpath in the launch configuration. But If I want to run the exported jar like this : java -jar -cp C:\project\lib;C:\project\config myclass.jar I get the oh wonderful java.lang.NullPointerException because it can't find the file. This sounds classic and stupid but I can't find a clue. What does eclipse do that I don't ? Thanks

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• if all my views are passed a strongly typed viewdata, if they have a baseviewdata class, can I set a

  - by Blankman

  I want all my views to inherit from a baseview data so I can set some shared properties that all my views will need. Can I set some properties in OnExecuting so I don't have to do it for all Actions? I want to then display the string value of the property in all my view pages. If yes, how can I do this? I need to hook into the base view data somehow? so i'll have: public MyViewData : ViewData { } And I need one for generics also?

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• Turkish character problems while parsing (Android)

  - by alper35.5

  I am parsing an html content and have output on my screen. This website have Turkish characters such as çÇsSöÖgGiIüÜ. I am not able to show them as proper characters, they are printed out as question marks yet. Eclipse - Project - Properties - Resource - Text File Encoding = Inherited from container (Cp1254) I searched web and found this solution: Eclipse - Project - Properties - Resource - Text File Encoding = Other: UTF-8 However, it's not working. It only changes my files' current characters. (I have titles that have such characters on my activities) Any help? Thanks in advance...

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• focusout not triggering when clicking on another selector with a click

  - by Sean

  I have 2 divs that each have clicks bound to them. when you click on a div a form is displayed (in another div) that allows you to set properties specific to the div that is clicked. I'm using focusout to save the properties to a data object. everything is working perfectly except when i click on the other div. it seems that the click handler on the other div cancels out the focusout of the form field. Has anyone else experienced this? is so what is the proper way to overcome this?

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• where clausule on field defined by sub-query

  - by stUrb

  I have this query which displays some properties and count the number of references to it from an other table: SELECT p.id,p.propName ( SELECT COUNT(*) FROM propLoc WHERE propLoc.propID = p.id ) AS number FROM property as p WHERE p.category != 'natural' This generates a good table with all the information I want to filter: id | propName | number 3 | Name 1 | 3 4 | Name 2 | 1 5 | Name 3 | 0 6 | Name 4 | 10 etc etc I now want to filter out the properties with number <= 0 So I tried to add an AND number > 0 But it reacts with Unknown column 'number' in 'where clause' apparently you can't filter on a name specified by a subquery? How can I achieve my goal?

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• Change Image in Resources at Runtime

  - by zaidwaqi

  Hi, My understanding of Resources is that I can combine resources i.e. images and my program into single executable. Let's say I have image pic1.png and I put it into Resource of my project, and is accessible with Properties.Resource.pic1. For example, PictureBox pb = new PictureBox(); pb.Image = Properties.Resource.pic1; What I want to do is for that my program will be able to replace this image at runtime. For example, my program runs, and locate newPicture.png, and use this new image to replace pic1.png that was originally used. Maybe my question is better reworded as "Can I include new image into Resources at runtime?" Please help. Thanks.

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• Request/Response objects

  - by Dan

  I'm planning on using CXF's rest implementation. I'm thinking of simply annotating my entity classes with jaxb annotations, such as @XmlRootElement, in order to create response objects. The benefit being avoidance of code duplication. As for the (client) request object, which will be used by a separate web app, I'm thinking of 'copying' the entity classes, removing the orm annotations, and adding jaxb annotations. Based on the above: Are there any dangers of creating request/response objects from entity classes? My entity classes contain relational properties, if I were to annotate them with @XmlRootElement, how can I stop the relational properties from being added (or considered apart of) to the response object? Is there a better/easier way to create request objects rather than copying the entity classes, removing/adding annotations?

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• Why is Hibernate not loading a column?

  - by B.R.

  I've got an entity with a few properties that gets used a lot in my Hibernate/GWT app. For the most part, everything works fine, but Hibernate refuses to load one of the properties. It doesn't appear in the query, despite being annotated correctly in the entity. The relevant portion of the entity: @Column(name="HasSubSlots") @Type(type="yes_no") public boolean hasSubSlotSupport() { return hasSubSlotSupport; } And the generated SQL query: Hibernate: /* load entities.DeviceModel */ select devicemode0_.DevModel as DevModel1_0_, devicemode0_.InvModelName as InvModel2_1_0_ from DeviceModels devicemode0_ where devicemode0_.DevModel=? Despite the fact that I refer to that property, it's never loaded, lazily or not, and the getter always returns false. Any ideas on how I can dig deeper into this, or what might be wrong?

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• Missing text in Windows dialog boxes

  - by rteslow

  After an update was installed via automatic updates dialog boxes have lost some of their text including some tabs. Example: http://rs-us.net/dialogbox.JPG

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• doctrine default values and relations

  - by Skirmantas

  Concept: Lets say we have table Properties with columns id and name (lets say with some predefined values: "Good" "Better" "Best"). Another table Users has column property_id with many to one relation on Properties (property_id = id). Users has default value on property_id, lets say 1 which means "Good". We might have another table analogue to Users however with default property, lets say "Better". What I need is ability to change default value for Users or other tables in administrator's panel. In mysql I can set default value for column like this: ALTER TABLE <Table> CHANGE <Column> DEFAULT <NEW_DEFAULT_VALUE> I can retrieve default value: SELECT DEFAULT(<Column>) FROM <Table> LIMIT 1 Is it possible to achieve this concept with Doctrine? What I actually need is such method in my table class: class UserTable extend Doctrine_Table { /* ... */ getDefaultProperty() { } setDefaultProperty($value) { /* $value can be either integer or Doctrine_Record */ } }

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• What is the point declaring variables at the end of class?

  - by serhio

  I saw multiple examples in MSDN that uses to declare the internal fields at the end of the class. What is the point? I find this a little embarrassing, because each time Visual Studio adds a method it adds it to the end of the class, so there is need every time to move it... class A { public A(){} // Methods, Properties, etc ... private string name; } class A { private string name; public A(){} // Methods, Properties, etc ... }

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• Object directing to a property when accessed as an iterable

  - by ThE_JacO

  I'm trying to figure out if there's an elegant and concise way to have a class accessing one of its own properties when "used" as a dictionary, basically redirecting all the methods that'd be implemented in an ordered dictionary to one of its properties. Currently I'm inheriting from IterableUserDict and explicitly setting its data to another property, and it seems to be working, but I know that UserDict is considered sort of old, and I'm concerned I might be overlooking something. What I have: class ConnectionInterface(IterableUserDict): def __init__(self, hostObject): self._hostObject= hostObject self.ports= odict.OrderedDict() self.inputPorts= odict.OrderedDict() self.outputPorts= odict.OrderedDict() self.data= self.ports This way I expect the object to behave and respond (and be used) the way I mean it to, except I want to get a freebie ordered dictionary behaviour on its property "ports" when it's iterated, items are gotten by key, something is looked up ala if this in myObject, and so on. Any advice welcome, the above seems to be working fine, but I have an odd itch that I might be missing something. Thanks in advance.

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• Small Business Setup SSO LDAP VPN [closed]

  - by outsmartin

  We are not sure how to setup an efficient network. Things we got so far: Linux Server ( probably Debian ) 3 Desktops + some Laptops ( Win / linux ) NAS ~10 people working 50/50 devs/normal people :) Things we want to achieve: Working from home should be easy, VPN and firewall single username/password for everybody windows/linux desktops should have automatic synched home folders / preferably from the NAS automated hostnames for apps so others can access them like http//john.dev_app from everywhere in the VPN Need starting point and documentation on setting up with Open source tools like OpenVPN and OpenLDAP Any recommendations or links to further literature are welcome.

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• identify slow motion on an mp4 movie

  - by shachary

  Hi, I am trying to find a way to identify slow motion on a movie (my case mp4). I am trying to do automatic editing on a live stram and cut only the slow motion. Any idea how can i do that? cli will be nice like ffmpeg... Thanks!

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• Get machine name from Active Directory

  - by Stephen Murby

  I have performed an "LDAP://" query to get a list of computers within a specified OU, my issue is not being able to collect just the computer "name" or even "cn". DirectoryEntry toShutdown = new DirectoryEntry("LDAP://" + comboBox1.Text.ToString()); DirectorySearcher machineSearch = new DirectorySearcher(toShutdown); //machineSearch.Filter = "(objectCatergory=computer)"; machineSearch.Filter = "(objectClass=computer)"; machineSearch.SearchScope = SearchScope.Subtree; machineSearch.PropertiesToLoad.Add("name"); SearchResultCollection allMachinesCollected = machineSearch.FindAll(); Methods myMethods = new Methods(); string pcName; foreach (SearchResult oneMachine in allMachinesCollected) { //pcName = oneMachine.Properties.PropertyNames.ToString(); pcName = oneMachine.Properties["name"].ToString(); MessageBox.Show(pcName); } Help much appreciated.

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• Return an opaque object to the caller without violating type-safety

  - by JS Bangs

  I have a method which should return a snapshot of the current state, and another method which restores that state. public class MachineModel { public Snapshot CurrentSnapshot { get; } public void RestoreSnapshot (Snapshot saved) { /* etc */ }; } The state Snapshot class should be completely opaque to the caller--no visible methods or properties--but its properties have to be visible within the MachineModel class. I could obviously do this by downcasting, i.e. have CurrentSnapshot return an object, and have RestoreSnapshot accept an object argument which it casts back to a Snapshot. But forced casting like that makes me feel dirty. What's the best alternate design that allows me to be both type-safe and opaque?

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• MVC more specified models should be populated by more precise query too?

  - by KevinUK

  If you have a Car model with 20 or so properties (and several table joins) for a carDetail page then your LINQ to SQL query will be quite large. If you have a carListing page which uses under 5 properties (all from 1 table) then you use a CarSummary model. Should the CarSummary model be populated using the same query as the Car model? Or should you use a separate LINQ to SQL query which would be more precise? I am just thinking of performance but LINQ uses lazy loading anyway so I am wondering if this is an issue or not.

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