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  • Rails on server syntax error?

    - by Danny McClelland
    Hi Everyone, I am trying to get my rails application running on my web server, but when I run the rake db:migrate I get the following error: r oot@oak [/home/macandco/rails_apps/survey_manager]# rake db:migrate (in /home/macandco/rails_apps/survey_manager) == Baseapp: migrating ======================================================== -- create_table(:settings, {:force=>true}) -> 0.0072s -- create_table(:users) -> 0.0072s -- add_index(:users, :login, {:unique=>true}) -> 0.0097s -- create_table(:profiles) -> 0.0084s -- create_table(:open_id_authentication_associations, {:force=>true}) -> 0.0067s -- create_table(:open_id_authentication_nonces, {:force=>true}) -> 0.0064s -- create_table(:roles) -> 0.0052s -- create_table(:roles_users, {:id=>false}) -> 0.0060s rake aborted! An error has occurred, all later migrations canceled: 555 5.5.2 Syntax error. g9sm2526951gvc.8 Has anyone come across this before? Thanks, Danny Main Migration file c lass Baseapp < ActiveRecord::Migration def self.up # Create Settings Table create_table :settings, :force => true do |t| t.string :label t.string :identifier t.text :description t.string :field_type, :default => 'string' t.text :value t.timestamps end # Create Users Table create_table :users do |t| t.string :login, :limit => 40 t.string :identity_url t.string :name, :limit => 100, :default => '', :null => true t.string :email, :limit => 100 t.string :mobile t.string :signaturenotes t.string :crypted_password, :limit => 40 t.string :salt, :limit => 40 t.string :remember_token, :limit => 40 t.string :activation_code, :limit => 40 t.string :state, :null => :false, :default => 'passive' t.datetime :remember_token_expires_at t.string :password_reset_code, :default => nil t.datetime :activated_at t.datetime :deleted_at t.timestamps end add_index :users, :login, :unique => true # Create Profile Table create_table :profiles do |t| t.references :user t.string :real_name t.string :location t.string :website t.string :mobile t.timestamps end # Create OpenID Tables create_table :open_id_authentication_associations, :force => true do |t| t.integer :issued, :lifetime t.string :handle, :assoc_type t.binary :server_url, :secret end create_table :open_id_authentication_nonces, :force => true do |t| t.integer :timestamp, :null => false t.string :server_url, :null => true t.string :salt, :null => false end create_table :roles do |t| t.column :name, :string end # generate the join table create_table :roles_users, :id => false do |t| t.column :role_id, :integer t.column :user_id, :integer end # Create admin role and user admin_role = Role.create(:name => 'admin') user = User.create do |u| u.login = 'admin' u.password = u.password_confirmation = 'advices' u.email = '[email protected]' end user.register! user.activate! user.roles << admin_role end def self.down # Drop all BaseApp drop_table :settings drop_table :users drop_table :profiles drop_table :open_id_authentication_associations drop_table :open_id_authentication_nonces drop_table :roles drop_table :roles_users end end

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  • Table-Valued Parameter in Stored Procedure and the Entity Framework 4.0

    - by Fabio
    Hi there, I have a stored procedure called 'GetPrices' with a Table-Valued Parameter called 'StoreIDs' and I would like to call it from my Entity Framework. But when I try to add the Stored Procedure to the EDM, i get the following error: The function 'GetPrices' has a parameter 'StoreIDs' at parameter index 2 that has a data type 'table type' which is not supported. The function was excluded. Is there any workaround this? Any thoughts? Fabio

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  • Queyring container with Linq + group by ?

    - by Prix
    public class ItemList { public int GuID { get; set; } public int ItemID { get; set; } public string Name { get; set; } public entityType Status { get; set; } public class Waypoint { public int Zone { get; set; } public int SubID { get; set; } public int Heading { get; set; } public float PosX { get; set; } public float PosY { get; set; } public float PosZ { get; set; } } public List<Waypoint> Routes = new List<Waypoint>(); } I have a list of items using the above class and now I need to group it by ItemID and join the first entry of Routes of each iqual ItemID. So for example, let's say on my list I have: GUID ItemID ListOfRoutes 1 23 first entry only 2 23 first entry only 3 23 first entry only 4 23 first entry only 5 23 first entry only 6 23 first entry only 7 23 first entry only Means I have to group entries 1 to 7 as 1 Item with all the Routes entries. So I would have one ItemID 23 with 7 Routes on it where those routes are the first element of that given GUID Routes List. My question is if it is possible using LINQ to make a statment to do something like that this: var query = from ItemList entry in myList where status.Contains(entry.Status) group entry by entry.ItemID into result select new { items = new { ID = entry.ItemID, Name = entry.Name }, routes = from ItemList m in entry group m.Routes.FirstOrDefault() by n.NpcID into m2 }; So basicly I would have list of unique IDS information with a inner list of all the first entry of each GUID route that had the same ItemID. <<< UPDATE: This would be an example of public List<ItemList> myList = new List<ItemList>(); data: GUID ItemID ListOfRoutes 1 20 Routes[1] 2 20 Routes[2] 3 20 Routes[3] 4 20 Routes[4] 5 20 Routes[5] 6 55 Routes[6] 7 55 Routes[7] 8 55 Routes[8] 9 1 Routes[9] 10 1 Routes[10] As you can see GUID is unique, ItemID can reapeat it self. Each GUID has a Routes list and all routes list have a minimum of 1 entry and above. Routes example. Routes[1] have: Entry Zone SubID Heading PosX PosY PosZ 1 1200 0 100 1029.32 837.21 29.10 2 1200 0 120 1129.32 537.21 29.10 3 1200 0 180 1229.32 137.21 29.10 4 1200 0 360 1329.32 437.21 29.10 5 1200 0 100 1429.32 637.21 29.10 Routes[2] have: Entry Zone SubID Heading PosX PosY PosZ 1 100 0 10 129.32 437.21 29.10 So what I want to do is a list of all entries I have on myList grouped by ItemID maintainning the fields ItemID and Name ... and a new field or item that will have all the first elements of Routes of those GUIDs. For example ItemID 20 would produce the follow result: ItemID, Name, ListOfRoutes This ItemID ListOfRoutes would contain Routes[1] first entry: Entry Zone SubID Heading PosX PosY PosZ 1 1200 0 100 1029.32 837.21 29.10 Routes[2] first entry: Entry Zone SubID Heading PosX PosY PosZ 1 100 0 10 129.32 437.21 29.10 Routes[3], Routes[4], Routes[5] first entries. Example of how myList is feeded: ItemList newItem = new ItemList(); newItem.GUID = GUID; newItem.ItemID = ItemID; newItem.Name = Name; newItem.Status = Status; // Item location ItemList.Waypoint itemLocation = new ItemList.Waypoint(); itemLocation.SubID = SubID; itemLocation.Zone = Zone; itemLocation.Heading = convertHeading(Heading); itemLocation.PosX = PosX; itemLocation.PosY = PosY; itemLocation.PosZ = PosZ; itemLocation.Rest = Rest; newItem.Routes.Add(itemLocation); myList.Add(newItem);

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  • javascript problem on tab control

    - by mahfuz
    my tab control have four itmes. Each tab item are individual usercontrol and they have javascript method.*But always tab item1 index=0 works well*,rest of item javascript don't work.But individually they work well ,problem arise when i put them in tab control.*when i click rest of tab items javascript function Tab item1 index=0 ascx* page always load . server side event C# code works well for all tab items.....How to solve this problem .....What's the problem is? i use devespress tool ..... <table> <tr> <td> <dxtc:ASPxPageControl Width="500px" ID="ASPxPageControl1" runat="server" ActiveTabIndex="0" EnableCallbackCompression="True" EnableHierarchyRecreation="True" AutoPostBack="True"> <TabPages> <dxtc:TabPage Text="Charge Company"> <ContentCollection> <dxw:ContentControl ID="ContentControl1" runat="server"> <uc1:UCConfig_Charge_Company_Wise ID="UCConfig_Charge_Company_Wise" runat="server" /> </dxw:ContentControl> </ContentCollection> </dxtc:TabPage> <dxtc:TabPage Text="Charge Depository Company"> <ContentCollection> <dxw:ContentControl ID="ContentControl3" runat="server"> <uc2:UCConfig_Charge_Depository_Company_Wise ID="UCConfig_Charge_Depository_Company_Wise" runat="server" /> </dxw:ContentControl> </ContentCollection> </dxtc:TabPage> <dxtc:TabPage Text="Investor Charge "> <ContentCollection> <dxw:ContentControl ID="ContentControl5" runat="server"> <uc4:UCConfig_Investor_Account_Wise_Charge ID="UCConfig_Investor_Account_Wise_Charge" runat="server" /> </dxw:ContentControl> </ContentCollection> </dxtc:TabPage> <dxtc:TabPage Text="Charge Operation Mode "> <ContentCollection> <dxw:ContentControl ID="ContentControl4" runat="server"> <uc3:UCconfig_charge_operation_mode ID="UCconfig_charge_operation_mode" runat="server" /> </dxw:ContentControl> </ContentCollection> </dxtc:TabPage> </TabPages> </dxtc:ASPxPageControl> </td> </tr> </table> my first tab control item works well.but rest of them create problem.i need to call javascript all of them but calling javascript from others create problem ,they show me bellow error Microsoft JScript runtime error: 'this.GetStateInput().value' is null or not an object

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  • Get two records from PLSQL cursor

    - by Hany
    My question is short. I create a cursor to get some values from my table. I want to get the current record of cursor (the fetched record) and the next record from the cursor without fetching it, because I want to make a calculation over the current record and the next record. In traditional programming it's a simple operation; you can do it with a for index by increasing it by 1. Do you have any suggestions?

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  • get information from cleartrip.com using api key in java

    - by zahir hussain
    i want to get information about hotels, flight and train from http://cleartrip.com. i have registered there and get api key... i put all information in program for getting hotel details... but i get 401 error... i use this link for getting api key and all information http://www.cleartrip.com/api/index.shtml#getting_started thanks and advance

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  • HAProxy authenticated httpchk (health check)

    - by Markel
    I am using HAProxy on EC2 and using httpchk to manage node availability. I had used a pseudo-unique path as the health check route in an attempt to make sure only my servers responded to the health check. Earlier today I had an EC2 server fall out of existence, and before the haproxy config was auto-regenerated (controller issues), Amazon had reassigned the IP to someone whom 200's every request (honeypot?), my HAProxy host then pulled the server back into rotation and started distributing some of my traffic there until the controller recovered and removed the ip from the list. TLDR; Is there a way to add a server authentication method to HAProxy's httpchk?

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  • jQuery show/hide menu problem

    - by jerrygarciuh
    Hi folks, I am encountering an odd behavior using jQuery to show/hide a menu. I have an absolutely positioned div which contains an "activator " div (relatively positioned) which I want to reveal a menu on moseover. Menu div is contained by the activator div and is also relatively positioned. I was working on assumption that since it would be contained by the activator that rolloff would not be triggered when the mouse travels over into the reveled menu. When you roll onto the revealed menu however show/hide starts pulsing and does so a second or so even after the mouse clears the area. CSS looks like this #myAbsolutePos { position:absolute; height:335px; width:213px; top:508px; left:0; z-index:2; } #activator { position:relative; height:35px; margin-top:95px; text-align:center; width:inherit; cursor:pointer; } #menu { position:relative; height:255px; width:243px; top:-45px; left:190px; padding:20px 25px 20px 25px; } #menuContents { width:190px; } jQuery funcs: $('#activator').mouseover(function () { $('#menu').show('slow'); }); $('#activator').mouseout(function () { $('#menu').hide('slow'); }); HTML: <div id="myAbsolutePos"> <div id="activator"> // content <div id="menu" style="display:none"> <div id="menuContents"> // content </div> </div> </div> </div> To see problem in action roll over the current weather location (Thunder Horse) in the lower left here: http://www.karlsenner.dreamhosters.com/index.php Any advice is most appreciated! JG

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  • IE 7 crashes with style position relative

    - by prakash
    Hi All, Below link code causing IE 7 to Crash when link is clicked , when googled it is saying there is bug in IE 7 DO there is any work around for this ? <a title="FAQ" style="position:relative;right:235px;top:-55px;" target="_blank" href="http://www.Google.com/ccp/index.jsp?pg_name=shared/help/page/Somahlep_FAQ_hwtp">READ OUR FAQS</a>

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  • Server Configuration / Important Parameter for 500Req/Second

    - by Sparsh Gupta
    I am configuring a server to be used as nginx server for a very heavy traffic website. It is expected to receive traffic from a large number of IP addresses simultaneously. It is expected to get 500Req/Second with atleast 20Million unique IPs connecting it. One of the problems I noticed in my previos server was related to iptables / ipconntrack. I am not aware of this behaviour and would be glad to know which all parameters of a ubuntu / debian (32/64) bit machine should I tweek to get maximum performance from the server. I can put in a lot of RAM on the server but mission critical task is the response times. We ideally dont want any connection to be hanging / timing out / waiting and want as low as possible overall response times. P.S. We are also looking for a kick ass freelancer system admin who can help us figuring / setting this all up. Reach me incase you have some spare time and interested in working on some very heavy traffic website servers.

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  • Manage Upload Permissions, SFTP & Linux

    - by John R
    I'm new to Linux. I am working with a Redhat 5.5 server and am using a Java-based SFTP script that will allow multiple users to upload text files to a server. I am undecided if each user will have a separate directory or if I will use a naming convention that includes their customer ID. The files include some personal information about their LAN settings, so I prefer to use SFTP as apposed to FTP. It is my understanding that SFTP is encrypted (Also, I have a Java class configured to upload via SFTP, so I prefer not to switch protocols unless their is a very-good reason). The prototype is for a system that will support large numbers of customers and the thought of continually adding and removing clients through the command line seems highly impractical. (Again, I am new_to/learning Linux and Redhat). What are normal conventions for giving multiple users permission to SFTP upload files with a unique username and password for each.

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  • Simple Workstation Imaging Solution?

    - by user23087
    I need a fairly cheap imaging solution for Windows XP corporate desktops. Ideally, I'd be able to set up a desktop exactly as we want it, create an image, deploy this image to a server, then boot a new desktop to a CD/USB Drive/Network and quickly set up the workstation. Ideally, each computer would also have a unique workstation name. Any ideas? Right now I'm using a custom built Linux DD solution, but it's slow, not network-based, can't image multiple computers at the same time as there's only one copy on a USB drive, and can't uniquely name the computers. Thanks, Will

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  • MediaTemple tcpsndbuf QoS Alerts

    - by theturninggate
    I'm hosting with MediaTemple on a (dv) Dedicated-Virtual 3.5 server. My site consists of a Wordpress blog, some custom PHP pages (nothing too intense), and I server 500-700 unique visitors per day. Despite my pretty modest numbers, I suffer from regular Apache crashes on account of QoS Alerts, mostly flagged as "tcpsndbuf". MediaTemple support -- usually tops -- has been pretty useless on this matter. I'm looking for answers as to how/why this is happening, advice on how to stop it. My website is a good portion of my livelihood, and downtime equates to lost income. Any and all help much appreciated. -Matt

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  • Retrieve EF4 POCOs using WCF REST services starter kit

    - by muruge
    I am using WCF REST service (GET method) to retrieve my EF4 POCOs. The service seem to work just fine. When I query the uri in my browser I get the results as expected. In my client application I am trying to use WCF REST Starter Kit's HTTPExtension method - ReadAsDataContract() to convert the result back into my POCO. This works fine when the POCO's navigation property is a single object of related POCO. The problem is when the navigation property is a collection of related POCOs. The ReadAsDataContract() method throws an exception with message "Object reference not set to an instance of an object." Below are my POCOs. [DataContract(Namespace = "", Name = "Trip")] public class Trip { [DataMember(Order = 1)] public virtual int TripID { get; set; } [DataMember(Order = 2)] public virtual int RegionID { get; set; } [DataMember(Order = 3)] public virtual System.DateTime BookingDate { get; set; } [DataMember(Order = 4)] public virtual Region Region { // removed for brevity } } [DataContract(Namespace = "", Name = "Region")] public class Region { [DataMember(Order = 1)] public virtual int RegionID { get; set; } [DataMember(Order = 2)] public virtual string RegionCode { get; set; } [DataMember(Order = 3)] public virtual FixupCollection<Trip> Trips { // removed for brevity } } [CollectionDataContract(Namespace = "", Name = "{0}s", ItemName = "{0}")] [Serializable] public class FixupCollection<T> : ObservableCollection<T> { protected override void ClearItems() { new List<T>(this).ForEach(t => Remove(t)); } protected override void InsertItem(int index, T item) { if (!this.Contains(item)) { base.InsertItem(index, item); } } } And this is how I am trying retrieve a Region POCO. static void GetRegion() { string uri = "http://localhost:8080/TripService/Regions?id=1"; HttpClient client = new HttpClient(uri); using (HttpResponseMessage response = client.Get(uri)) { Region region; response.EnsureStatusIsSuccessful(); try { region = response.Content.ReadAsDataContract<Region>(); // this line throws exception because Region returns a collection of related trips Console.WriteLine(region.RegionName); } catch (Exception ex) { Console.WriteLine(ex.Message); } } } Would appreciate any pointers.

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  • Company Password Management

    - by Brian Wigginton
    The topic of personal password management has been covered in great detail time after time. This question is aimed at the business or organization that needs to keep track of many unique passwords for many clients. What are some strategies/tools or ideas you all have for accomplishing this task? I was at an Interactive Agency, where we needed to keep track of client DB, ftp, mail... and for different environments for the app so any one client would have up to 3-10 passwords usually. This can get crazy when there are more than 250 clients

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  • targetFrame _blank MVSiteMapCOntrib

    - by Jonathan
    Im using the MVC Contrib project to generate my menu system for an MVC site. How does one target a blank target. I have looked at the code but cant seem to figure why mines not generating a target="_blank" tag. <mvcSiteMapNode title="Hello WOrld" controller="Home" action="Index" changeFrequency="Always" updatePriority="Normal" targetFrame="_blank"> </mvcSiteMapNode>

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  • Fast user switching is logging users off instead of switching users

    - by Nathan Osman
    I have a netbook running Windows 8.1 Pro that will no longer allow more than one user to be logged in at the same time. The steps necessary to reproduce this are as follows: The current user presses WIN to bring up the start screen. The user clicks his name in the corner and a list of other users appears. As soon as one of the other names is clicked, the user is unceremoniously logged off without any prompts. This behavior seems to have started some time after upgrading to Windows 8.1 from Windows 8. Before that point, everything worked fine and more than one user could be logged in at the same time. I've tried searching for others experiencing similar problems but this appears to be unique. System Details: CPU: Intel Atom N455 @ 1.66 GHz RAM: 1 GB OS: Windows 8.1 Pro w/ Media Center 32-bit

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  • Blackberry - Listfield layout question

    - by Kai
    I'm having an interesting anomaly when displaying a listfield on the blackberry simulator: The top item is the height of a single line of text (about 12 pixels) while the rest are fine. Does anyone know why only the top item is being drawn this way? Also, when I add an empty venue in position 0, it still displays the first actual venue this way (item in position 1). Not sure what to do. Thanks for any help. The layout looks like this: ----------------------------------- | *part of image* | title | ----------------------------------- | | title | | * full image * | address | | | city, zip | ----------------------------------- The object is called like so: listField = new ListField( venueList.size() ); listField.setCallback( this ); listField.setSelectedIndex(-1); _middle.add( listField ); Here is the drawListRow code: public void drawListRow( ListField listField, Graphics graphics, int index, int y, int width ) { listField.setRowHeight(90); Hashtable item = (Hashtable) venueList.elementAt( index ); String venue_name = (String) item.get("name"); String image_url = (String) item.get("image_url"); String address = (String) item.get("address"); String city = (String) item.get("city"); String zip = (String) item.get("zip"); EncodedImage img = null; try { String filename = image_url.substring(image_url.indexOf("crop/") + 5, image_url.length() ); FileConnection fconn = (FileConnection)Connector.open( "file:///SDCard/Blackberry/project1/" + filename, Connector.READ); if ( !fconn.exists() ) { } else { InputStream input = fconn.openInputStream(); byte[] data = new byte[(int)fconn.fileSize()]; input.read(data); input.close(); if(data.length > 0) { EncodedImage rawimg = EncodedImage.createEncodedImage( data, 0, data.length); int dw = Fixed32.toFP(Display.getWidth()); int iw = Fixed32.toFP(rawimg.getWidth()); int sf = Fixed32.div(iw, dw); img = rawimg.scaleImage32(sf * 4, sf * 4); } else { } } } catch(IOException ef) { } graphics.drawText( venue_name, 140, y, 0, width ); graphics.drawText( address, 140, y + 15, 0, width ); graphics.drawText( city + ", " + zip, 140, y + 30, 0, width ); if(img != null) { graphics.drawImage(0, y, img.getWidth(), img.getHeight(), img, 0, 0, 0); } }

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  • Facebooker extended permissions??

    - by Ivan
    Facebook gives access to users' emails via the extended permission. There's also a way in JS and PHP to force users to grant the permission when they accept the app's TOS - http://wiki.developers.facebook.com/index.php/Extended_permissions Is there a way that I can do this with Facebooker? Regards..

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  • CSS 100% Height Div

    - by Neb
    Im making a website http://nebkat.com/beta/index.php and there is a grey background and a white background for content(see for yourself). The problem is that I cant set the white part to be 100% height. It only stays up to the title(Welcome...) and then it stops.

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  • Is it possible to disable ARP in Windows 7

    - by DriverGuy
    I have a unique requirement where I need to disable ARP on a Windows 7 box. In previous Windows versions you could modify the ArpRetryCount in the registry (and set it to 0), but this does not work in 7 (nor does it exist). Does anybody know how, or if this is possible? I've been asked to elaborate this more and I'm not quite sure how. I want to switch off ARP (including gratuitous arp) on Windows 7 for a project I'm working on. You can do this in Linux by simply adding '-arp' when you bring up an interface, but you cannot do this in Windows 7. You could in previous versions by modifying the registry, but this does not work any more. If the fine folk here aren't sure then I don't like my chances...

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  • Best way to replicate / mirror 100s of databases in SQL 2005

    - by mrwayne
    Hi, I currently host around 400-500 SQL 2005 databases of varying sizes (1-10 gig) each. I am aware of most of the different methods available and the general pros/cons of mirroring, log shipping, replication and clustering, but i am not aware of how well they tend to perform when its employed at the size i have specified (400-500 unique databases). Does anyone have any good advice on what is likely the best method for having the ability to fail over to another server with this sort of setup? Fail over does not need to be immediate, i'm just looking for something better than taking backups every day and moving them to storage. I'm preferably looking for something that would also makes it easy to manage the databases in bulk (as opposed to one at a time). Thanks for your input!

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  • How to post something to Facebook from Android?

    - by Nicholas Key
    Hi stackoverflow'ers, Quick questions here: What are the necessary tools/APIs to post something from Android to Facebook? I looked at this URL http://wiki.developers.facebook.com/index.php/User%3AAndroid and it mentioned a few suggestions. Have anyone tried fbrocket? What is Facebook Connect anyway? Thanks! Nicholas

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  • How to make multiple Popups using Jquery

    - by Rajasekar
    For pop up im using the following code style : a.selected { background-color:#1F75CC; color:white; z-index:100; } .messagepop { background-color:#FFFFFF; border:1px solid #999999; cursor:default; display:none; margin-top: 15px; position:absolute; text-align:left; width:394px; z-index:50; padding: 25px 25px 20px; } label { display: block; margin-bottom: 3px; padding-left: 15px; text-indent: -15px; } .messagepop p, .messagepop.div { border-bottom: 1px solid #EFEFEF; margin: 8px 0; padding-bottom: 8px; } JavaScript : $(function() { $("#contact").live('click', function(event) { $(this).addClass("selected").parent().append('<div class="messagepop pop"><form method="post" id="new_message" action="/messages"><p><label for="email">Your email or name</label><input type="text" size="30" name="email" id="email" /></p><p><label for="body">Message</label><textarea rows="6" name="body" id="body" cols="35"></textarea></p><p><input type="submit" value="Send Message" name="commit" id="message_submit"/> or <a class="close" href="/">Cancel</a></p></form></div>'); $(".pop").slideFadeToggle() $("#email").focus(); return false; }); $(".close").live('click', function() { $(".pop").slideFadeToggle(); $("#contact").removeClass("selected"); return false; }); }); $.fn.slideFadeToggle = function(easing, callback) { return this.animate({ opacity: 'toggle', height: 'toggle' }, "fast", easing, callback); }; and finally <a href="/contact" id="contact">Contact Us</a> I need to include another pop up when the register link is clicked. Whether i should use the same function with modifications or seperate functions. Please provide me the code with modifications. Im so weird. Help me.

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  • Hibernate : Foreign key constraint violation problem

    - by Vinze
    I have a com.mysql.jdbc.exceptions.MySQLIntegrityConstraintViolationException in my code (using Hibernate and Spring) and I can't figure why. My entities are Corpus and Semspace and there's a many-to-one relation from Semspace to Corpus as defined in my hibernate mapping configuration : <class name="xxx.entities.Semspace" table="Semspace" lazy="false" batch-size="30"> <id name="id" column="idSemspace" type="java.lang.Integer" unsaved-value="null"> <generator class="identity"/> </id> <property name="name" column="name" type="java.lang.String" not-null="true" unique="true" /> <many-to-one name="corpus" class="xxx.entities.Corpus" column="idCorpus" insert="false" update="false" /> [...] </class> <class name="xxx.entities.Corpus" table="Corpus" lazy="false" batch-size="30"> <id name="id" column="idCorpus" type="java.lang.Integer" unsaved-value="null"> <generator class="identity"/> </id> <property name="name" column="name" type="java.lang.String" not-null="true" unique="true" /> </class> And the Java code generating the exception is : Corpus corpus = Spring.getCorpusDAO().getCorpusById(corpusId); Semspace semspace = new Semspace(); semspace.setCorpus(corpus); semspace.setName(name); Spring.getSemspaceDAO().save(semspace); I checked and the corpus variable is not null (so it is in database as retrieved with the DAO) The full exception is : com.mysql.jdbc.exceptions.MySQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails (`xxx/Semspace`, CONSTRAINT `FK4D6019AB6556109` FOREIGN KEY (`idCorpus`) REFERENCES `Corpus` (`idCorpus`)) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:931) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2941) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1623) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1715) at com.mysql.jdbc.Connection.execSQL(Connection.java:3249) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1268) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1541) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1455) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1440) at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:102) at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:73) at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:33) at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2158) at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2638) at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:48) at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250) at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:298) at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:181) at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187) at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172) at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27) at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70) at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:535) at org.hibernate.impl.SessionImpl.save(SessionImpl.java:523) at org.hibernate.impl.SessionImpl.save(SessionImpl.java:519) at org.springframework.orm.hibernate3.HibernateTemplate$12.doInHibernate(HibernateTemplate.java:642) at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:373) at org.springframework.orm.hibernate3.HibernateTemplate.save(HibernateTemplate.java:639) at xxx.dao.impl.AbstractDAO.save(AbstractDAO.java:26) at org.apache.jsp.functions.semspaceManagement_jsp._jspService(semspaceManagement_jsp.java:218) [...] The foreign key constraint has been created (and added to database) by hibernate and I don't see where the constraint can be violated. The table are innodb and I tried to drop all tables and recreate it the problem remains... EDIT : Well I think I have a start of answer... I change the log level of hibernate to DEBUG and before it crash I have the following log insert into Semspace (name, [...]) values (?, [...]) So it looks like it does not try to insert the idCorpus and as it is not null it uses the default value "0" which does not refers to an existing entry in Corpus table...

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