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• Deleting inline model in Django admin

  - by Overclocked

  I am trying to use Django admin to remove an inline model. I get an error saying [u'Select a valid choice. That choice is not one of the available choices.'] I check the location where the exception is raised. It seems like the inline model was removed, then a form validation happened on the parent model with the deleted inline model still as value of the form. That caused the failure. In my admin model, I had a save_formset method defined, that called formset.save(commit=False). Is the commit=False not telling Django to not delete the related models? Thanks.

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• How would I initialize these two lists so that modifying one doesn't modify the other?

  - by Brandon

  I'm aware of why this is happening, but is there any way to do this without having to implement ICloneable or a Copy() method? Preferably .net 2.0, but 3.5 is fine if it is necessary. Essentially I'm trying to implement an undo method. In most cases I can just perform the reverse action in the Undo(), but for others that is not possible. So I want to keep two lists. One for the list of items that I will be modifying, and one for the original, unmodified list of items. This way if I need to do an undo, I just delete the modified items and replace them with the originals. Most of the ways I've tried to assign the _originalItems variable doesn't work, so what would I need to do? public MyClass(List<SelectedItems> selectedItems) { _selectedItems = new List<SelectedItems>(selectedItems); _originalItems = ?? }

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• Restricting deletion with NHibernate

  - by FrontSvin

  I'm using NHibernate (fluent) to access an old third-party database with a bunch of tables, that are not related in any explicit way. That is a child tables does have parentID columns which contains the primary key of the parent table, but there are no foreign key relations ensuring these relations. Ideally I would like to add some foreign keys, but cannot touch the database schema. My application works fine, but I would really like impose a referential integrity rule that would prohibit deletion of parent objects if they have children, e.i. something similar 'ON DELETE RESTRICT' but maintained by NHibernate. Any ideas on how to approach this would be appreciated. Should I look into the OnDelete() method on the IInterceptor interface, or are there other ways to solve this? Of course any solution will come with a performance penalty, but I can live with that.

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• .save puts NULL in user_id field in Ruby on Rails

  - by mathee

  Here's the model file: class ProfileTag < ActiveRecord::Base def self.create_or_update(options = {}) id = options.delete(:id) record = find_by_id(id) || new record.id = id record.attributes = options puts "record.profile_id is" puts record.profile_id record.save! record end end This gives me the correct print out in my log. But it also says that there's a call to UPDATE that sets profile_id to NULL. I'm not sure I understand why the INSERT puts the value into profile_id properly, but then it sets it to NULL on an UPDATE. If you need more specifics, please let me know. I'm thinking that the save functionality does many things other than INSERTs into the database, but I don't know what I need to specify so that it will properly set profile_id.

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• T-SQL - Is there a (free) way to compare data in two tables?

  - by RPM1984

  Okay so i have table a and table b. (SQL Server 2008) Both tables have the exact same schema. For the purposes of this question, consider table a = my local dev table, table b = the live table. I need to create a SQL script (containing UPDATE/DELETE/INSERT statements) that will update table b to be the same as table a. This script will then be deployed to the live database. Any free tools out there that can do this, or better yet a way i can do it myself? I'm thinking i probably need to do some type of a join on all the fields in the tables, then generate dynamic sql based on that. Anyone have any ideas?

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• jquery selector question

  - by FFish

  How can I select the src attr from the zoom span? $(".gallery span.zoom").click(function() { // var imgPath = $(this).parent()......attr("src"); // alert(imgPath); return false; }); <ul class="gallery"> <li id="li-1"> <img src="002171/tn/001.jpg" alt="image" /> <span class="delete"></span> <span class="zoom"></span> <em>hello world</em> </li> </ul>

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• How do I completely disable caching in Cakephp?

  - by James Lamiell

  So I opened the cache floodgates in my Cakephp app and now I want to close them... I've done pretty everything I can: delete all files in the tmp folder (but not the folders), turned 'Cache.disable' on in the core.php file in my app, have tried clearing the cache from within some controllers with clearCache() and Cache::clear() (but I suspect this doesn't work because it's not loading the controller -- due to caching). I've pretty much effectively halted my development process just because caching won't turn off. Anyone have some ideas that I could try? I'm starting to think it may be within the browser or maybe my hosting service, but it's probably just Cakephp messing with me.

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• refresh page with ajax jquery without use of reload function

  - by Ronak Patel

  I am performing delete records by using jquery ajax in php. I want to refresh that content without the use of location.reload() function. I tried this, $("#divSettings").html(this); but, it's not working. What's the correct logic to get updated content in div. Thanks. Code: function deletePoll(postId){ $.ajax({ type: "POST", url: "../internal_request/ir_display_polls.php", data: { postId: postId }, success: function(result) { location.reload(); //$("#divSettings").html(this); } }); }

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• table row long press

  - by adoo42

  I have a table which is built dynamically based on how much data is present, if at all. I want to be able to long press anywhere on a the table row to be able to get some options to delete or edit etc. Is this possible? Remember I need to do all this without setting any XML as its dynamically built. Is this relevant to what I want to achieve? ` @override public boolean onKeyLongPress(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { // do your stuff here return true; } return super.onKeyLongPress(keyCode, event); } ` any advice is appreciated.

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• remove component from initComponent()

  - by jouzef19

  hi i am using netBeans editor to create desktop application , i did something wrong that generate three line of code in the initComponent() method related to connection with database. Then i removed the lines by opening the .java file in txt editor , but one of them keep coming back when i do anything with netBeans editor , So i want to delete this line from the netbeans itself . this is the line historyList = java.beans.Beans.isDesignTime() ? java.util.Collections.emptyList() : ((javax.persistence.Query)null).getResultList(); and this is its declaration private java.util.List<idetect.History> historyList;

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• Animate a e.Graphics.DrawLine with arrowhead

  - by Fer

  I need to "animate" an arrow. It can go in any direction (up, down, left, right and diagonals) and the arrowhead will be at the end. It needs to appear as if it is growing from orgin to the end. To make matters more complicated it has to be in a user control so it is possible to add to the controls collection in the forms and remove it to delete it from the screen, and its background is really transparent (no color.transparent) so i can't paint the background to "clear" the previous line. I have it static already (drawn from origin to end) but i can't animate it. I tried to add a timer in the user control but I fail to get a correct algorithm to calculate the intermediate ends of the line while it is growing. Any help would be appreciated. Thanks

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• Looking at the C++ new[] cookie. How portable is this code?

  - by carleeto

  I came up with this as a quick solution to a debugging problem - I have the pointer variable and its type, I know it points to an array of objects allocated on the heap, but I don't know how many. So I wrote this function to look at the cookie that stores the number of bytes when memory is allocated on the heap. template< typename T > int num_allocated_items( T *p ) { return *((int*)p-4)/sizeof(T); } //test #include <iostream> int main( int argc, char *argv[] ) { using std::cout; using std::endl; typedef long double testtype; testtype *p = new testtype[ 45 ]; //prints 45 std::cout<<"num allocated = "<<num_allocated_items<testtype>(p)<<std::endl; delete[] p; return 0; } I'd like to know just how portable this code is.

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• What is problem with below class

  - by user258367

  class LinkedList { private: int data; LinkedList *ptr; public: LinkedList(int i_data) { data = i_data; ptr = 0; { ~LinkedList() { delete ptr ; } void insert(LinkedList *node) { while(this->next != 0) this = this->next; this->next = node; } I will be creating a head node like head = new LinkedList(4) and then will be calling like head->insert(new LinkedList(5)) and subsequently . Can you please tell me does above class represent a linkedlist . i think yes it has node which contain address of next node . Please correct me if i am wrong

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• How do I avoid nesting forms when offering inline editing of lists with checkboxes for mass updates.

  - by adam

  A lot of sites offer the ability to edit lists of items inline as well as allowing multiple items to be selected via checkboxes and have an action performed all at once e.g. delete, mark as spam etc. But how do you implement this without violating html rules. I need one form for the checkboxes with individual submit_tags for the mass actions. But after a user clicks on an item in the list, another form via Ajax will be inserted within the checkbox form. How do I avoid doing this? I'm using rails and jQuery.

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• Mixing HTML and STRUTS2 tags

  - by ryan

  I have a form which has both HMTL tags and struts tags. I use the HTML tags because of alignment issues with struts tags. <s:form action = "setNode" name = "processing" method ="POST"> <script> <!-- createTree(catArray); </script> <br/> <s:radio name="processOption" label="" list="{'Add','Move','Delete'}" ></s:radio> <s:textfield name="node" ></s:textfield> <s:submit name="Go" value=" Go " align="center" /> </s:form> the createTree function creates a tree form with HTML checkbox input types. The action triggers a java function. How do i see which checkboxes are checked?

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• how to access jquery internal data?

  - by Unknown

  As you may or may not be aware as of jQuery 1.7 the whole event system was rewritten from the ground up. The codebase is much faster and with the new .on() method there is a lot of uniformity to wiring up event handlers. One used to be able to access the internal events data and investiate what events are registered on any given element, but recently this internal information has been hidden based on the following scenario... It seems that the "private" data is ALWAYS stored on the .data(jQuery.expando) - For "objects" where the deletion of the object should also delete its caches this makes some sense. In the realm of nodes however, I think we should store these "private" members in a separate (private) cache so that they don't pollute the object returned by $.fn.data()" Although I agree with the above change to hide the internal data, I have found having access to this information can be helpful for debugging and unit testing. What was the new way of getting the internal jquery event object in jQuery 1.7?

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• Many-to-one relationship in SQLAlchemy

  - by Arrieta

  This is a beginner-level question. I have a catalog of mtypes: mtype_id name 1 'mtype1' 2 'mtype2' [etc] and a catalog of Objects, which must have an associated mtype: obj_id mtype_id name 1 1 'obj1' 2 1 'obj2' 3 2 'obj3' [etc] I am trying to do this in SQLAlchemy by creating the following schemas: mtypes_table = Table('mtypes', metadata, Column('mtype_id', Integer, primary_key=True), Column('name', String(50), nullable=False, unique=True), ) objs_table = Table('objects', metadata, Column('obj_id', Integer, primary_key=True), Column('mtype_id', None, ForeignKey('mtypes.mtype_id')), Column('name', String(50), nullable=False, unique=True), ) mapper(MType, mtypes_table) mapper(MyObject, objs_table, properties={'mtype':Relationship(MType, backref='objs', cascade="all, delete-orphan")} ) When I try to add a simple element like: mtype1 = MType('mtype1') obj1 = MyObject('obj1') obj1.mtype=mtype1 session.add(obj1) I get the error: AttributeError: 'NoneType' object has no attribute 'cascade_iterator' Any ideas?

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• Who deleted my sql table rows?

  - by vikasde

  I have an SQL table, from which data is being deleted. Nobody knows how the data is being deleted. I added a trigger and know the time, however no jobs are running that would delete the data. I also added a trigger whenever rows are being deleted from this table. I am then inserting the deleted rows and the SYSTEM_USER to a log table, however that doesnt help much. Is there anything better I can do to know who and how the data gets deleted? Would it be possible to get the server id or something? Thanks for any advice. Sorry: I am using SQL Server 2000.

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• Pointers in For loops

  - by Bobby

  Quick question: I am a C# guy debugging a C++ app so I am not used to memory management. In the following code: for(int i = 0; i < TlmMsgDB.CMTGetTelemMsgDBCount(); i++) { CMTTelemetryMsgCls* telm = TlmMsgDB.CMTGetTelemetryMsg(i); CMT_SINT32_Tdef id = telm->CMTGetPackingMapID(); ManualScheduleTables.SetManualMsg(i,id); ManualScheduleTables.SetManExec(i,false); } Am I leaking memory every iteration b/c of CMTTelemetryMsgCls* telm = TlmMsgDB.CMTGetTelemetryMsg(i);? The "CMTGetTelemetryMsg(int)" method returns a pointer. Do I have to "delete telm;" at the end of each iteration?

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• best method for background uploader in Android

  - by Dr.Dredel

  Problem: I want to write a process that will allow a user to take photos with the device and for those photos to then be uploaded to some listener in the cloud. The user should not have to do anything to initiate the upload, a background listener would just watch the folder and as long as it finds files in it it would upload them and delete them. Two problems: 1) how to keep the program running in the background even after the user is no longer taking pictures (and if they reboot the device for it to wake up and finish the uploads, if any remain) 2) assuming the connection is spotty (as it always is) how to verify that a given image has completed its upload, and if not, to resubmit it. I don't need any code examples, I just would like opinions on the best strategy to get this implemented. I was going to use Apache commons and just do an upload to a PHP, but am not sure what sort of error checking exists to take into account a connection drop mid file. TIA.

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• Even lighter than SQLite

  - by Richard Fabian

  I've been looking for a C++ SQL library implementation that is simple to hook in like SQLite, but faster and smaller. My projects are in games development and there's definitely a cutoff point between needing to pass the ACID test and wanting some extreme performance. I'm willing to move away from SQL string style queries, allowing it to be code driven, but I haven't found anything out there that provides SQL like flexibility while also preferring performance over the ACID test. I don't want to go reinventing the wheel, and the idea of implementing an SQL library on my own is quite daunting, even if it's only going to be simple subset of all the calls you could make. I need the basic commands (SELECT, MODIFY, DELETE, INSERT, with JOIN, and WHERE), not data operations (like sorting, min, max, count) and don't need the database to be atomic, or even enforce consistency (I can use a real SQL service while I'm testing and debugging).

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• Drupal pass argument to page

  - by stotastic

  I have a custom Drupal module displaying some data in a table. Each row has a link which if clicked will delete the relevant row. Specifically, when the link is clicked it will take the user to a confirmation page. This page is really just a drupal form which says 'are you sure' with two buttons: 'Yes', 'No'. I figure I will need to pass the rowID to the confirmation page. My question: What is the typically way to pass data to a new page in Drupal 7? I guess I could just add the rowID to the URL and use the $_GET[] from the confirmation page... I don't think this is very safe and was wondering if there was a better 'Drupal' way. Thanks!

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• Controling the visibility of a Bitmap in .NET

  - by ET

  Hi everyone, I am trying to create this simple application in c#: when the user double clicks on specific location in the form, a little circle will be drawn. By one click, if the current location is marked by a circle - the circle will be removed. I am trying to do this by simply register the MouseDoubleClick and MouseClick events, and to draw the circle from a .bmp file the following way: private void MouseDoubleClick (object sender, MouseEventArgs e) { Graphics g = this.CreateGraphics(); Bitmap myImage = (Bitmap)Bitmap.FromFile("Circle.bmp"); g.DrawImage(myImage, e.X, e.Y); } My problem is that I dont know how to make the circle unvisible when the user clicks its location: I know how to check if the selected location contains a circle (by managing a list of all the locations containig circles...), but I dont know how exactly to delete it. Another question: should I call the method this.CreateGraphics() everytime the user double-clicks a location, as I wrote in my code snippet, or should I call it once on initialization?

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• XPathDocument behavior with DOCTYPE declaration

  - by gliderkite

  I use XPathDocument to parse an XML file, but if there's a doctype declaration, when I initializes a new instance of the XPathDocument class passing the path of the file, that contains the XML data, to its constructor, my application tries to connect to internet (probably to verify the correctness of the XML data) and remains blocked for a long period of time. This does not occur if I delete the doctype declaration from the XML file. XmlDocument.Load method has the same behavior. How can I fix this problem? Thanks.

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• How do I conditionally assign ruby variables to javascript variables?

  - by Tony

  I have a website where I need a javascript version of the "current user" object along with the ruby version. I have been assigning these variables doing something like this... Application Controller: def get_user begin @current_user = User.find(session[:user_id]) if session[:user_id] @current_user_json = @current_user.to_json rescue session.delete(:user_id) @current_user = nil @current_user_json = {} end end Web Page: var current_user = null; current_user_json = '<%= @current_user_json %>'; if(current_user_json != ''){ current_user = current_user_json.user; } Even when there is a current user, I get the current user is undefined. Probably because I am putting the current_user_json assignment around single quotes. However, if I don't put it around single quotes, I'll always get a javascript error when no user is logged in because the syntax is invalid - current_user_json = ; I think I am just looking at this completely wrong and there must be a better way. Given that this is probably a common thing to do, I wanted to get other people's opinion on how to create an object in javascript that is a duplicate of the ruby object.

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