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Approach for authentication and storing user details.

- by cappuccino

Hey folks, I am using the Zend Framework but my question is broadly about sessions / databases / auth (PHP MySQL). Currently this is my approach to authentication: 1) User signs in, the details are checked in database. - Standard stuff really. 2) If the details are correct only the user's unique ID is stored in the session and a security token (user unique ID + IP + Browser info + salt). The session in written to the filesystem. I've been reading around and many are saying that storing stuff in sessions is not a good idea, and that you should really only write a unique ID which refers back to the user's details and a security token to prevent session hijacking. So this is the approach i've taken, i use to write the user's details in session, but i've moved that out. Wanted to know your opinions on this. I'm keeping sessions in the filesystem since i don't run on multiple servers, and since i'm only writting a tiny tiny bit of data to sessions, i thought that performance would be greater keeping sessions in the filesystem to reduce load on the database. Once the session is written on authentication, it really is only read-only from then on. 3) The rest of the user's details (like subscription details, permissions, account info etc) are cached in the filesystem (this can always be easily moved to memory if i wanted even more performance). So rather than keeping the user's details in session, the user's details are cached in the file system. I'm using Zend_Cache and the unique cache id is something like md5(/cache/auth/2892), the number is the unique id of the user. I guess the benefit of this method is that once the user is logged in, there is essentially not database queries being run to get the user's details. Just wonder if this approach is better than keeping the whole lot in session... 4) As the user moves throughout the site the only thing that is checked is the ID in the session and the security token. So, overall the first question is 1) is the filesystem more efficient than a database for this purpose 2) have i taken enough security precautions 3) is separating user detail's from the session into a cached file a pointless task? Thanks.

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Django unit testing: South-migrated DB works in MySQL, throws duplicate PK error in PostGreSQL. Am I

- by unclaimedbaggage

Hi folks, (Worth starting off with a disclaimer: I'm very new to PostGreSQL) I have a django site which involves a standard app/tests.py testing file. If I migrate the DB to MySQL (through South),, the tests all pass. However in PostGresQL, I'm getting the following error: IntegrityError: duplicate key value violates unique constraint "business_contact_pkey" Note this happens while unit testing only - the actual page runs fine in both MySQL & PostGresql. Really having a heckuva time figuring this one out. Anyone have ideas? Below are the Postgresql "\d business_contact" & offending tests.py method if they help. No changes made to either DB except the (same) South migrations Thanks first_name | character varying(200) | not null mobile_phone | character varying(100) | surname | character varying(200) | not null business_id | integer | not null created | timestamp with time zone | not null deleted | boolean | not null default false updated | timestamp with time zone | not null slug | character varying(150) | not null phone | character varying(100) | email | character varying(75) | id | integer | not null default nextval('business_contact_id_seq'::regclass) Indexes: "business_contact_pkey" PRIMARY KEY, btree (id) "business_contact_slug_key" UNIQUE, btree (slug) "business_contact_business_id" btree (business_id) Foreign-key constraints: "business_id_refs_id_772cc1b7b40f4b36" FOREIGN KEY (business_id) REFERENCES business(id) DEFERRABLE INITIALLY DEFERRED Referenced by: TABLE "business" CONSTRAINT "primary_contact_id_refs_id_dfaf59c4041c850" FOREIGN KEY (primary_contact_id) REFERENCES business_contact(id) DEFERRABLE INITIALLY DEFERRED TEST DEF: def test_add_business_contact(self): """ Add a business contact """ contact_slug = 'test-new-contact-added-new-adf' business_id = 1 business = Business.objects.get(id=business_id) postdata = { 'first_name': 'Test', 'surname': 'User', 'business': '1', 'slug': contact_slug, 'email': '[email protected]', 'phone': '12345678', 'mobile_phone': '9823452', 'business': 1, 'business_id': 1, } #Test to ensure contacts that should not exist are not returned contact_not_exists = Contact.objects.filter(slug=contact_slug) self.assertFalse(contact_not_exists) #Add the contact and ensure it is present in the DB afterwards """ contact_add_url = '%s%s/contact/add/' % (settings.BUSINESS_URL, business.slug) self.client.post(contact_add_url, postdata) added_contact = Contact.objects.filter(slug=contact_slug) print added_contact try: self.assertTrue(added_contact) except: formset = ContactForm(postdata) print formset.errors self.assertFalse(True, "Contact not found in the database - most likely, the post values in the test didn't validate against the form")

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SQLAlchemy: a better way for update with declarative?

- by hadrien

I am a SQLAlchemy noob. Let's say I have an user table in declarative mode: class User(Base): __tablename__ = 'user' id = Column(u'id', Integer(), primary_key=True) name = Column(u'name', String(50)) When I know user's id without object loaded into session, I update such user like this: ex = update(User.__table__).where(User.id==123).values(name=u"Bob Marley") Session.execute(ex) I dislike using User.__table__, should I stop worrying with that? Is there a better way to do this? Thanx!

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Why doesn't this piece of php code work?

- by Sam Gabriel

Hey guys, I have a mysql database which stores an id for each picture, as well as the picture's url and its thumbnail url. the thumbnail url is something like thumbs/pic.jpg and the page I'm creating has the folder thumbs in the same place it is created. But when I run this piece of code, nothing shows up: <?php ini_set('display_errors', 'On'); error_reporting(E_ALL | E_STRICT); mysql_connect("localhost", "***", "***") or die(mysql_error()); mysql_select_db("pics") or die(mysql_error()); $results = mysql_query("select id from classpics") or die(mysql_error()); $data=mysql_fetch_array($results); foreach($data as $uno) { echo '<td valign="middle" align="center"><a class="neutral" href="../images.php?id=' . $uno['id'] . '"><img src="'. $uno['thumbs'].'" border="0" /></a></td>'; } ?>

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Symfony Form render with Self Referenced Entity

- by benarth

I have an Entity containing Self-Referenced mapping. class Category { /** * @var integer * * @ORM\Column(name="id", type="integer") * @ORM\Id * @ORM\GeneratedValue(strategy="AUTO") */ private $id; /** * @var string * * @ORM\Column(name="name", type="string", length=100) */ private $name; /** * @ORM\OneToMany(targetEntity="Category", mappedBy="parent") */ private $children; /** * @ORM\ManyToOne(targetEntity="Category", inversedBy="children") * @ORM\JoinColumn(name="parent_id", referencedColumnName="id") */ private $parent; } In my CategoryType I have this : public function buildForm(FormBuilderInterface $builder, array $options) { $plan = $this->plan; $builder->add('name'); $builder->add('parent', 'entity', array( 'class' => 'xxxBundle:Category', 'property' => 'name', 'empty_value' => 'Choose a parent category', 'required' => false, 'query_builder' => function(EntityRepository $er) use ($plan) { return $er->createQueryBuilder('u') ->where('u.plan = :plan') ->setParameter('plan', $plan) ->orderBy('u.id', 'ASC'); }, )); } Actually, when I render the form field Category this is something like Cat1 Cat2 Cat3 Subcat1 Subcat2 Cat4 I would like to know if it's possible and how to display something more like, a kind of a simple tree representation : Cat1 Cat2 Cat3 -- Subcat1 -- Subcat2 Cat4 Regards.

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how to submit a from with validation in PHP?

- by jitendra

I want to submit this form through PHP. with validation for required field and validation for phone number and email field also <form action="" method="" id="get-protected"> <div class="row requiredRow"> <label for="txt_FirstName"> First Name</label> <input id="txt_FirstName" type="text" class="required" title="First Name. This is a required field" /> </div> <div class="row"> <label for="txt_LastName"> Last Name</label> <input id="txt_LastName" type="text" title="First Name. This is a required field" /> </div> <div class="row"> <label for="txt_Phone"> Phone</label> <input id="txt_Phone" type="text" title="First Name. This is a required field" /> </div> <div class="row requiredRow"> <label for="txt_Email"> Email</label> <input id="txt_Email" type="text" class="required" title="Email. This is a required field" /> </div> <div class="row"> <input type="submit" value="" class="button" /> </div> </form>

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IE7 z-index problem with Flash content

- by lbolognini

I have a problem with flash content in IE7 being always over the menu items I have a structure like the following: <div id='skyscraper_flash'>  <object>  </object> </div> <div id='menu'>  <ul> <li>foo</li> <li>bar</li> </ul> </div> Now then the last item of the menu opens it shows behind the flash content. The skyscraper is on the right of the page content. What should i look into?

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Using a set of numbers inside a database without creating a temporary table

- by Zizzencs

I have a set of numbers and a table in a database with the id (primary key) and text (not null) columns. I would like to create a query that returns all the numbers in the set and the associated text from the table. Unfortunately not all numbers exist in the database's id column, so this won't work: select id, text from table where id in (<set of numbers>) For the non-existing ids the best would be to return null as the text from the query. Is there a way to produce the desired output without first creating a temporary table from the set inside the database? The database engine in use is a Microsoft SQL Server 2008 SP1 but I'd be interested in any solution with any database engine.

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Rendering another Action without changing URL?

- by Michael Stum

I have this code in my Rails 3 controller: def index now = Time.now.utc.strftime("%m%d") redirect_to :action => "show", :id => now end def show begin @date = Time.parse("12#{params[:id]}") dbdate = params[:id] rescue ArgumentError @date = Time.now.utc dbdate = @date.strftime("%m%d") end @date = @date.strftime("%B %d") @events = Event.events_for_date(dbdate) end So basically index is just a specialized version of show, hence I want it to execute show, render the show.html.erb view - but I do not want to change the URL like redirect_to does. I have tried this approach: def index now = Time.now.utc.strftime("%m%d") params[:id] = now show render :action => "show" end Now, this works, but it just smells badly. I'm new to Ruby and Rails, so I just wonder if there is something fundamentally wrong or if there is a better way to do this?

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Graph call "/me/friends" doesn't contain names if called from a testuser

- by Marc

When I log into Facebook with my account and call the Graph API with /me/friends it returns an array like this: [ {id: "6868...", name: "John Smith"}, {id: "7531...", name: "Diane Smith"}, ... ] But if I'm logged in with a Facebook testuser and do the same call I get an array like this: [ {id: "100002927..."}, {id: "100003151..."}, ... ] So I'm missing the name property. Bug? Or did I some mistake? I'm using the JS SDK, but I think that doesn't matter.

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Help with PHP simplehtmldom - Modifiying a form.

- by onemyndseye

Ive gotten some great help here and I am so close to solving my problem that I can taste it. But I seem to be stuck. I need to scrape a simple form from a local webserver and only return the lines that match a users local email (i.e. onemyndseye@localhost). simplehtmldom makes easy work of extracting the correct form element: foreach($html->find('form[action*="delete"]') as $form) echo $form; Returns: <form action="/delete" method="post"> <input type="checkbox" id="D1" name="D1" /><a href="http://www.linux.com/rss/feeds.php"> http://www.linux.com/rss/feeds.php </a> [email: onemyndseye@localhost (Default) ]<br /> <input type="checkbox" id="D2" name="D2" /><a href="http://www.ubuntu.com/rss.xml"> http://www.ubuntu.com/rss.xml </a> [email: onemyndseye@localhost (Default) ]<br /> However I am having trouble making the next step. Which is returning lines that contain 'onemyndseye@localhost' and removing it so that only the following is returned: <input type="checkbox" id="D1" name="D1" /><a href="http://www.linux.com/rss/feeds.php">http://www.linux.com/rss/feeds.php</a> <br /> <input type="checkbox" id="D2" name="D2" /><a href="http://www.ubuntu.com/rss.xml">http://www.ubuntu.com/rss.xml</a> <br /> Thanks to the wonderful users of this site Ive gotten this far and can even return just the links but I am having trouble getting the rest... Its important that the complete <input> tags are returned EXACTLY as shown above as the id and name values will need to be passed back to the original form in post data later on. Thanks in advance!

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XPathNavigator.Evaluate returning incorrect value?

- by Eric

I'm expecting this code to return true but it doesn't ? What am I missing here. string xml = @"<data><e id=""NUM_CPUS"">1</e><e id=""ACE_PRESENT"">1</e></data>"; XPathDocument doc = new XPathDocument(new StringReader(xml)); string expr = "(id('NUM_CPUS'))>=1 and (id('ACE_PRESENT'))=1"; XPathNavigator nav = doc.CreateNavigator(); XPathExpression query = nav.Compile(expr); object result = nav.Evaluate(query); bool b = bool.Parse(result.ToString()); if (!b) throw new Exception("Should be true");

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Should I Use Anchor, Button Or Form Submit For "Follow" Feature In Rails

- by James

I am developing an application in Rails 3 using a nosql database. I am trying to add a "Follow" feature similar to twitter or github. In terms of markup, I have determined that there are three ways to do this. 1) Use a regular anchor. (Github Uses This Method) <a href="/users/follow?target=Joe">Follow</a> 2) Use a button. (Twitter Uses This Method) <button href="/friendships/create/">Follow</button> 3) Use a form with a submit button. (Has some advantages for me, but I haven't see anyone do it yet.) <form method="post" id="connection_new" class="connection_new" action="/users/follow"> <input type="hidden" value="60d7b563355243796dd8496e17d36329" name="target" id="target"> <input type="submit" value="Follow" name="commit" id="connection_submit"> </form> Since I want to store the user_id in the database and not the username, options 1 and 2 will force me to do a database query to get the actual user_id, whereas option 3 will allow me to store the user_id in a hidden form field so that I don't have to do any database lookups. I can just get the id from the params hash on form submission. I have successfully got each of these methods working, but I would like to know what is the best way to do this. Which way is more semantic, secure, better for spiders, etc...? Is there a reason both twitter and github don't use forms to do this? Any guidance would be appreciated. I am leaning towards using the form method since then I don't have to query the db to get the id of the user, but I am worried that there must be a reason the big guys are just using anchors or buttons for this. I am a newb so go easy on me if I am totally missing something. Thanks!

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Can't access annotation property of subclassed uibutton - editted

- by Tzur Gazit

Below is my original question. I kept investigating and found out that the type of the button I allocate is of type UIButton instead of the subclassed type CustomButton. the capture below is the allocation of the button and connection to target. I break immediately after the allocation and check the button type (po rightButton at the debugger console). It's turned out tht the type is UIButton instead of CustomButton. CustomButton* rightButton = [CustomButton buttonWithType:UIButtonTypeDetailDisclosure]; [rightButton addTarget:self action:@selector(showDetails:) forControlEvents:UIControlEventTouchUpInside]; I have a mapView to which I add annotations. The pin's callout have a button (rightCalloutAccessoryView). In order to be able to display various information when the button is pushed, i've subclassed uibutton and added a class called "Annotation". @interface CustomButton : UIButton { NSIndexPath *indexPath; Annotation *mAnnotation; } @property (nonatomic, retain) NSIndexPath *indexPath; @property (nonatomic, copy) Annotation *mAnnotation; - (id) setAnnotation2:(Annotation *)annotation; @end Here is "Annotation": @interface Annotation : NSObject <MKAnnotation> { CLLocationCoordinate2D coordinate; NSString *mPhotoID; NSString *mPhotoUrl; NSString *mPhotoName; NSString *mOwner; NSString *mAddress; } @property (nonatomic, assign) CLLocationCoordinate2D coordinate; @property (nonatomic, copy) NSString *mPhotoID; @property (nonatomic, copy) NSString *mPhotoUrl; @property (nonatomic, copy) NSString *mPhotoName; @property (nonatomic, copy) NSString *mOwner; @property (nonatomic, copy) NSString *mAddress; - (id) initWithCoordinates:(CLLocationCoordinate2D)coordinate; - (id) setPhotoId:(NSString *)id url:(NSString *)url owner:(NSString *)owner address:(NSString *)address andName:(NSString *)name; @end I want to set the annotation property of the uibutton at - (MKAnnotationView *)mapView:(MKMapView *)pMapView viewForAnnotation:(id )annotation, in order to refer to it at the button push handler (-(IBAction) showDetails:(id)sender). The problem is that I can't set the annotation property of the button. I get the following message at run time: 2010-04-27 08:15:11.781 HotLocations[487:207] *** -[UIButton setMAnnotation:]: unrecognized selector sent to instance 0x5063400 2010-04-27 08:15:11.781 HotLocations[487:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[UIButton setMAnnotation:]: unrecognized selector sent to instance 0x5063400' 2010-04-27 08:15:11.781 HotLocations[487:207] Stack: ( 32080987, 2472563977, 32462907, 32032374, 31884994, 55885, 30695992, 30679095, 30662137, 30514190, 30553882, 30481385, 30479684, 30496027, 30588515, 63333386, 31865536, 31861832, 40171029, 40171226, 2846639 ) I appreciate the help. Tzur.

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Dice Emulation - ImageView

- by Michelle Harris

I am trying to emulate dice using ImageView. When I click the button, nothing seems to happen. I have hard coded this example to replace the image with imageView4 for debugging purposes (I was making sure the random wasn't fail). Can anyone point out what I am doing wrong? I am new to Java, Eclipse and Android so I'm sure I've probably made more than one mistake. Java: import java.util.Random; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.ArrayAdapter; import android.widget.ImageView; import android.widget.Spinner; import android.widget.Toast; public class Yahtzee4Activity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Spinner s = (Spinner) findViewById(R.id.spinner); ArrayAdapter adapter = ArrayAdapter.createFromResource( this, R.array.score_types, android.R.layout.simple_spinner_dropdown_item); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); s.setAdapter(adapter); } public void onMyButtonClick(View view) { ImageView imageView1 = new ImageView(this); Random rand = new Random(); int rndInt = 4; //rand.nextInt(6) + 1; // n = the number of images, that start at index 1 String imgName = "die" + rndInt; int id = getResources().getIdentifier(imgName, "drawable", getPackageName()); imageView1.setImageResource(id); } } XML for the button: <Button android:id="@+id/button_roll" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/roll" android:onClick="onMyButtonClick" />

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table design for storing large number of rows

- by hyperboreean

I am trying to store in a postgresql database some unique identifiers along with the site they have been seen on. I can't really decide which of the following 3 option to choose in order to be faster and easy maintainable. The table would have to provide the following information: the unique identifier which unfortunately it's text the sites on which that unique identifier has been seen The amount of data that would have to hold is rather large: there are around 22 millions unique identifiers that I know of. So I thought about the following designs of the table: id - integer identifier - text seen_on_site - an integer, foreign key to a sites table This approach would require around 22 mil multiplied by the number of sites. id - integer identifier - text seen_on_site_1 - boolean seen_on_site_2 - boolean ............ seen_on_site_n - boolean Hopefully the number of sites won't go past 10. This would require only the number of unique identifiers that I know of, that is around 20 millions, but it would make it hard to work with it from an ORM perspective. one table that would store only unique identifiers, like in: id - integer unique_identifier - text, one table that would store only sites, like in: id - integer site - text and one many to many relation, like: id - integer, unique_id - integer (fk to the table storing identifiers) site_id - integer (fk to sites table) another approach would be to have a table that stores unique identifiers for each site So, which one seems like a better approach to take on the long run?

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XSL Grouping Problem

- by Wail

I have the following xml and I an trying to perform the following 1- Group By the first Field where id="1923" if the value attribute is the same 2- and average all the fields with id="3095" using the value attribute 3- and average all the fields with id="3095" using the value attribute Trying to produce the following: Test 1 5.33 5.33 Test 2 3 4 Test 3 4 4

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Trying to fadein divs in a sequence, over time, using JQuery

- by user346602

Hi, I'm trying to figure out how to make 4 images fade in sequentially when the page loads. The following is my (amateurish) code: Here is the HTML: <div id="outercorners"> <img id="corner1" src="images/corner1.gif" width="6" height="6" alt=""/> <img id="corner2" src="images/corner2.gif" width="6" height="6" alt=""/> <img id="corner3" src="images/corner3.gif" width="6" height="6" alt=""/> <img id="corner4" src="images/corner4.gif" width="6" height="6" alt=""/> </div> Here is the JQuery: $(document).ready(function() { $("#corner1").fadeIn("2000", function(){ $("#corner3").fadeIn("4000", function(){ $("#corner2").fadeIn("6000", function(){ $("#corner4").fadeIn("8000", function(){ }); }); }); }); Here is the css: #outercorners { position: fixed; top:186px; left:186px; width:558px; height:372px; } #corner1 { position: fixed; top:186px; left:186px; display: none; } #corner2 { position: fixed; top:186px; left:744px; display: none; } #corner3 { position: fixed; top:558px; left:744px; display: none; } #corner4 { position: fixed; top:558px; left:186px; display: none; } They seem to just wink at me, rather than fade in in the order I've ascribed to them. Should I be using the queue() function? And, if so, how would I implement it in this case? Thank you for any assistance.

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CRSF token and Session replication with Tomcat and Apache

- by technocool

I have an J2EE compliant web application. I use a session based token to append a secondary id to all incoming link generated by my application. To prevent my application against CSRF attack, I validate the secondary id before I allow the user session to work off the subsequent page. Recently, while working with session replication mechanism implementation, I observed that on session failover, the generated secodary id is lost and the user get re directed to the login page/default page. Any suggestions on how I can ensure that the my generated secondary token id is not lost from the replicated session?

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Help with grasping (INNER?) JOIN

- by Greenie

I'm having trouble building a query. I can do what I want in 3 different queries. SELECT id FROM table1 WHERE url LIKE '%/$downloadfile' put that in $url_id SELECT item_id FROM table2 WHERE rel_id = '$url_id'" put that in $item_id SELECT rel_id FROM table2 WHERE rel_id = '$item_id' AND field_id = '42'" put that in $user_id But from reading examples on joins and inner joins I think there's a more elegant way. I cant wrap my brain around writing a better query (but would like to) I can describe how it should go: table1 fields: id, url table2 fields item_id, rel_id, field_id I know the last part of table1.url (LIKE '%/$filename') with that I select table1.id. table1.id is equal to one entry in table2.rel_id. So get that and select the table2.item_id. In table2 there is another entry which has the same table2.item_id and it will have a table2.field_id = '42' And finally the value I need is the table2.rel_id where the table2.field_id was 42. I will fetch that value and put it in $user_id Can this be done with one query using joins/inner joins?

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how to get day name in datetime in python

- by gadss

how can I get the day name (such as : Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, and Sunday) in datetime in python?... here is my code in my handlers.py from django.utils.xmlutils import SimplerXMLGenerator from piston.handler import BaseHandler from booking.models import * from django.db.models import * from piston.utils import rc, require_mime, require_extended, validate import datetime class BookingHandler(BaseHandler): allowed_method = ('GET', 'POST', 'PUT', 'DELETE') fields = ('id', 'date_select', 'product_name', 'quantity', 'price','totalcost', 'first_name', 'last_name', 'contact', 'product') model = Booking def read(self, request, id, date_select): if not self.has_model(): return rc.NOT_IMPLEMENTED try: prod = Product.objects.get(id=id) prod_quantity = prod.quantity merge = [] checkDateExist = Booking.objects.filter(date_select=date_select) if checkDateExist.exists(): entered_date = Booking.objects.values('date_select').distinct('date_select').filter(date_select=date_select)[0]['date_select'] else: entered_date = datetime.datetime.strptime(date_select, '%Y-%m-%d') entered_date = entered_date.date() delta = datetime.timedelta(days=3) target_date = entered_date - delta day = 1 for x in range(0,7): delta = datetime.timedelta(days=x+day) new_date = target_date + delta maximumProdQuantity = prod.quantity quantityReserve = Booking.objects.filter(date_select=new_date, product=prod).aggregate(Sum('quantity'))['quantity__sum'] if quantityReserve == None: quantityReserve = 0 quantityAvailable = prod_quantity - quantityReserve data1 = {'maximum_guest': maximumProdQuantity, 'available': quantityAvailable, 'date': new_date} merge.append(data1) return merge except self.model.DoesNotExist: return rc.NOT_HERE in my code: this line sets the date: for x in range(0,7): delta = datetime.timedelta(days=x+day) new_date = target_date + delta

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Ruby on Rails: link_to_remote and rel

- by DerNalia

I want a link to remote to have a rel tag, because I want to use facebox with it. I had it working with a regular link to... but I needed the link to remote to handle the event that a user doesn't have javascript enabled. this, currently does't work (except for the non-javascript part ) <%= link_to_remote "Ask a Question", {:url => {:action => :ask_question, :id => @container.id.to_s, :javascript_disabled => false }, :rel => 'facebox'}, :href => url_for( :controller => :view, :action => :ask_question, :id => @container.id.to_s, :javascript_disabled => true) %>

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Python: How do sets work

- by Guy

I have a list of objects which I want to turn into a set. My objects contain a few fields that some of which are o.id and o.area. I want two objects to be equal if these two fields are the same. ie: o1==o2 if and only if o1.area==o2.area and o1.id==o2.id. I tried over-writing __eq__ and __cmp__ but I get the error: TypeError: unhashable instance. What should I over-write?

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audio onprogress in chrome not working

- by user351709

Hi I am having a problem getting onprogress event for the audio tag working on chrome. it seems to work on fire fox. http://www.scottandrew.com/pub/html5audioplayer/ works on chrome but there is no progress bar update. When I copy the code and change the src to a .wav file and run it on fire fox it works perfectly. <style type="text/css"> #content { clear:both; width:60%; } .player_control { float:left; margin-right:5px; height: 20px; } #player { height:22px; } #duration { width:400px; height:15px; border: 2px solid #50b; } #duration_background { width:400px; height:15px; background-color:#ddd; } #duration_bar { width:0px; height:13px; background-color:#bbd; } #loader { width:0px; height:2px; } .style1 { height: 35px; } </style> <script type="text/javascript"> var audio_duration; var audio_player; function pageLoaded() { audio_player = $("#aplayer").get(0); //get the duration audio_duration = audio_player.duration; $('#totalTime').text(formatTimeSeconds(audio_player.duration)); //set the volume } function update(){ //get the duration of the player dur = audio_player.duration; time = audio_player.currentTime; fraction = time/dur; percent = (fraction*100); wrapper = document.getElementById("duration_background"); new_width = wrapper.offsetWidth*fraction; document.getElementById("duration_bar").style.width = new_width + "px"; $('#currentTime').text(formatTimeSeconds(audio_player.currentTime)); $('#totalTime').text(formatTimeSeconds(audio_player.duration)); } function formatTimeSeconds(time) { var minutes = Math.floor(time / 60); var seconds = "0" + (Math.floor(time) - (minutes * 60)).toString(); if (isNaN(minutes) || isNaN(seconds)) { return "0:00"; } var Strseconds = seconds.substr(seconds.length - 2); return minutes + ":" + Strseconds; } function playClicked(element){ //get the state of the player if(audio_player.paused) { audio_player.play(); newdisplay = "||"; }else{ audio_player.pause(); newdisplay = ">"; } $('#totalTime').text(formatTimeSeconds(audio_player.duration)); element.value = newdisplay; } function trackEnded(){ //reset the playControl to 'play' document.getElementById("playControl").value=">"; } function durationClicked(event){ //get the position of the event clientX = event.clientX; left = event.currentTarget.offsetLeft; clickoffset = clientX - left; percent = clickoffset/event.currentTarget.offsetWidth; duration_seek = percent*audio_duration; document.getElementById("aplayer").currentTime=duration_seek; } function Progress(evt){ $('#progress').val(Math.round(evt.loaded / evt.total * 100)); var width = $('#duration_background').css('width') $('#loader').css('width', evt.loaded / evt.total * width.replace("px","")); } function getPosition(name) { var obj = document.getElementById(name); var topValue = 0, leftValue = 0; while (obj) { leftValue += obj.offsetLeft; obj = obj.offsetParent; } finalvalue = leftValue; return finalvalue; } function SetValues() { var xPos = xMousePos; var divPos = getPosition("duration_background"); var divWidth = xPos - divPos; var Totalwidth = $('#duration_background').css('width').replace("px","") audio_player.currentTime = divWidth / Totalwidth * audio_duration; $('#duration_bar').css('width', divWidth); } </script> </head> <script type="text/javascript" src="js/MousePosition.js" ></script> <body onLoad="pageLoaded();"> <table> <tr> <td valign="bottom"><input id="playButton" type="button" onClick="playClicked(this);" value=">"/></td> <td colspan="2" class="style1" valign="bottom"> <div id='player'> <div id="duration" class='player_control' > <div id="duration_background" onClick="SetValues();"> <div id="loader" style="background-color: #00FF00; width: 0px;"></div> <div id="duration_bar" class="duration_bar"></div> </div> </div> </div> </td> </tr> <tr> <td> </td> <td> <span id="currentTime">0:00</span> </td> <td align="right" > <span id="totalTime">0:00</span> </td> </tr> </table> <audio id='aplayer' src='<%=getDownloadLink() %>' type="audio/ogg; codecs=vorbis" onProgress="Progress(event);" onTimeUpdate="update();" onEnded="trackEnded();" > <b>Your browser does not support the <code>audio</code> element. </b> </audio> </body>

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selenium cannot find element with class in IE

- by Rob

I'm using selenium_client with cucumber, webrat + IE As you'd expect, Firefox works fine. I've tried the following: selenium.is_visible("css=#flash .flash_notice") selenium.is_visible("xpath=//*[@id='flash']/*[@class='flash_notice]") selenium.is_visible("xpath=//*[@id='flash']/*[contains(@class,'flash_notice]')") both cannot find the element. I think it must be something to do with IE, looking closer at the html selenium returns from IE... It looks like this: <UL id=flash> <LI className=flash_notice>Deleted</LI> </UL> Notice IE returns the class attribute as className, is this confusing selenium? How can I get round this so that I can use the same statement for selenium using IE and Firefox Just to confuse us even more, this example works, confirming its something to do with checking the class attribute selenium.is_visible("xpath=//*[@id='flash']/*[. =\'Deleted\']")

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