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  • Django IN query as a string result - invalid literal for int() with base 10

    - by bmelton
    Trying to query a 'Favorites' model to get a list of items a user has favorited, and then querying against a different model to get the objects back from that query to present to the template, but I'm getting an error: "invalid literal for int() with base 10" Looking over all of the other instances of that error, I couldn't find any in which the asker actually wanted to work with a comma separated list of integers, so I'm kind of at a loss. Model class Favorite(models.Model): # key should be the model name, id is the model.id, and user is the User object. key = models.CharField(max_length=255, unique=True) val = models.IntegerField(default=0) user = models.ForeignKey(User) class Admin: list_display = ('key', 'id', 'user') View def index(request): favorites = Favorite.objects.filter(key='blog', user=request.user.pk) values = "" for favorite in favorites: values += "%s," % favorite.val #values = "[%s]" % values blogs = Blog.objects.filter(pk__in=values) return render_to_response('favorite/index.html', { "favorites" : favorites, "blogs" : blogs, "values" : values, }, context_instance=RequestContext(request) ) enter code here

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  • SQL Query with ORDER BY Part 2

    - by Brett
    Hi SQL'ers, This is a followup question to: SQL Query with ORDER BY But I think the SQL logic is going to be quite different, so I am posting it as separate question. I am trying to extend my sql SELECT query it and having some trouble: I have the table: id type radius ------------------------- 1 type1 0.25 2 type2 0.59 3 type1 0.26 4 type1 0.78 5 type3 0.12 6 type2 0.45 7 type3 0.22 8 type3 0.98 and I am trying to learn how to SELECT the second smallest radius for each given type. So the returned recordset should look like: id type radius ------------------------- 3 type1 0.26 2 type2 0.59 7 type3 0.22 (Note: in the referenced question, I was looking for the lowest radius, not the second lowest radius). I am assuming I have to use LIMIT and OFFSET, but if I use the MIN() won't that return a distinct record containing the minimum radius? Does anyone have any thoughts on how to attack this? Many thanks, Brett

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  • Timed email reminder in python

    - by Ali
    I have written up a python script that allows a user to input a message, his email and the time and they would like the email sent. This is all stored in a mysql database. However, how do I get the script to execute on the said time and date? will it require a cron job? I mean say at 2:15 on april 20th, the script will search the database for all times of 2:15, and send out those emails. But what about for emails at 2:16? I am using a shared hosting provided, so cant have a continously running script. Thanks

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  • Making a module based social networking cms

    - by Manan
    What does it take to create a social networking cms like phpfox or socialengine . I am interested in using php / mysql . However , I want it to be modular , like above examples . Like I can enable disable videos from backend . Most important , it should have ability to allow others to extend it , like facebook applications . Should I follow a framework [ cakephp or something ]? Should I use some pattern [ factory or singleton ] ? Is there any book available on subject ?

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  • Self Assessment Tests for Programmers

    - by THX1138.6
    I want to help the Dev team identify areas of knowledge (practical and theoretical) that they can work on. Though I am big believer in focusing on people's strengths being a good programmer requires (I think) being challenged by concepts and ideas that don't always come naturally. We work largely in the web app space using PHP & MySQL but better skills in data modelling, query optimisation, use of MVC and OOP etc. would help the team and the company a lot. I want to help the Dev team manage their careers, explore and expand their skills sets. Be all they can be and better than they were previously. I know its an idealistic goal but work must be about more than simply getting the work done. There should be some time to review, to learn, to grow and get better. Any thoughts, ideas, opinions and directions to tests or similar resources would be greatly appreciated.

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  • Is it possible to calculate distance on GeoDjango in a SELECT statement?

    - by alex
    I am using MYSQL. I have a table with 1 column, a Point field. I want to SELECT all rows that have a point with a distance less than 50 meters of my given point. Simple enough, right? Below is how it's done in RAW SQL. But of course, I want to use GeoDjango to do this. cursor.execute("SELECT * FROM project_location WHERE\ (GLength(LineStringFromWKB(LineString(asbinary(utm), asbinary(PointFromWKB(point(%s, %s)))))) < 50)\

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  • Additional/Optional query string parameters in URI Template in WCF

    - by Rajesh Kumar
    I have written a simple REST Service in WCF in which I have created 2 method using same URI Template but with different Method(POST and GET). For GET method I am also sending additional query parameters as follows: [WebInvoke(Method = "POST", UriTemplate = "users")] [OperationContract] public bool CreateUserAccount(User user) { //do something return restult; } [WebGet(UriTemplate = "users?userid={userid}&username={userName}")] [OperationContract] public User GetUser(int userid, string userName) { // if User ID then // Get User By UserID //else if User Name then // Get User By User Name //if no paramter then do something } when I call CreateUserAccount with method POST it is working fine but when I call GetUser method using GET and sending only one query string parameter(userID or UserName) it is giving error "HTTP Method not allowed" but if send both parameters its wokrs fine. Can anyone help me?

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  • archiving table records to another table by trigger(move daialy table records to weekly table, evry

    - by sirvan
    I have written this trigger in mysql 5: create trigger changeToWeeklly after insert on tbl_daily for each row begin insert into tbl_weeklly SELECT * FROM vehicleslocation v where v.recivedate < curdate(); delete FROM tbl_daily where recivedate < curdate(); end; i want to archive records by date, move yesterday inserted record from dailly to weekly table and last weekly table to mounthly table and deletes this records from previous table this trigger has following error when insert in daily tabled occurred : "Can't update table 'tbl_daily' in stored function/trigger because it is already used by statement which invoked this stored function/trigger." please help me to solve th problem of archive old data in related tables: move yesterday inserted records to weekly table, if there is a reliable solution tell me please.

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  • multiple polls with email submit function

    - by Chris Mousdale
    I want to add a 4 sets of polls that each have around 4 radio buttons each for answers - then i would like to add an 'enter your email address' field below these polls. Finally I would like the submit button after the email field to 'submit' the data from the polls and the email address entered - so only one submit button. Just to make things even better, I would like some form of validation, that will not pass the form unless all 4 polls have a radio button pressed and a valid email. All this is then to go into a MySQL database. I have the email validation bit nailed - so thats fine.. it's the multiple polls bit thats getting me - I cannot get it to work?! Do i have to effectively add 5 forms? Any help would be greatly appreciated.

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  • AJAX call in a continuously loop?

    - by Mestika
    Hi, I want to create some kind of AJAX script or call that continuously will check a MySQL database if any new messages has arrived. When there is a new message in the database, the AJAX script should invoke a kind of alert box or message box. I’m not quite a AJAX expert (yet anyway) and have Googled around to find a solution but I’m having a hard time to figure out where to begin. I imagine that it is kind of the same method that an AJAX chat is using to see if any new chat-message has been send. I’ve also tried to search for AJAX (httpxmlrequest) call in a continuously and infinity loop but still haven’t got a solution yet. I hope there is someone, which can help me with such a AJAX script or maybe nudge me in the right direction. Thanks Sincerely Mestika

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  • Does this schema sound better suited for a document-oriented data store or relational?

    - by Blaine LaFreniere
    Disclaimer: let me know if this question is better suited for serverfault.com I want to store information on music, specifically: genres artists albums songs This information will be used in a web application, and I want people to be able to see all of the songs associated to an album, and albums associated to an artist, and artists associated to a genre. I'm currently using MySQL, but before I make a decision to switch I want to know: How easy is scaling horizontally? Is it easier to manage than an SQL based solution? Would the above data I want to store be too hard to do schema-free? When I think association, I immediately think RDBMSs; can data be stored in something like CouchDB but still have some kind of association as stated above?

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  • Archiving an Entire Rails Site

    - by Pygmalion
    I have a Ruby on Rails site that was only needed for a short period of time during which users added various objects to a mySQL database, commenting on them, associating themselves with them, etc. etc. etc. The question is this: the site is no longer needed until a week next year around this time when I will clear the database and use it again (starting from scratch). What's the best way to archive the current site so that the existing content is still viewable but no new content can be added? By best way, I mean the method by which the least system resources will be used, the server will be the safest, etc. Any suggestions?

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  • Most efficient way to check if a date falls between two dates?

    - by Dave Jarvis
    Given: Start Month & Start Day End Month & End Day Any Year What SQL statement results in TRUE if a date lands between the Start and End days? 1st example: Start Date = 11-22 End Date = 01-17 Year = 2009 Specific Date = 2010-01-14 TRUE 2nd example: Start Date = 11-22 End Date = 11-16 Year = 2009 Specific Date = 2010-11-20 FALSE 3rd example: Start Date = 02-25 End Date = 03-19 Year = 2004 Specific Date = 2004-02-29 TRUE I was thinking of using the MySQL functions datediff and sign plus a CASE condition to determine whether the year wraps, but it seems rather expensive. Am looking for a simple, efficient calculation. Update The problem is the end date cannot simply use the year. The year must be increased if the end month/day combination happens before the start date. The start date is easy: Start Date = date( concat_ws( '-', year, Start Month, Start Day ) The end date is not so simple. Thank you!

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  • SharePoint's CAML query the "Created By" field with username

    - by yellowblood
    Hey, I have a form for administrators where they insert a user name ("domain\name") and the code gets and sets some information out of it. It's a huge project and some of the lists contain the username as a string ("domain\name"), but some lists only count on the "Created By" column, which is auto-created. I want to know what's the fastest way to query these lists using the username string. I tried to use the same query as the one I use for the first kind of lists and it obviously didn't work - <Where><Eq><FieldRef Name='UserName'/><Value Type='Text'>domain\\username</Value></Eq></Where> Thank you.

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  • Problem with Linq query and date format

    - by Alan T
    Hi All I have a C# console application written using Visual Studio 2008. My system culture is en-GB. I have a Linq query that looks like this: var myDate = "19-May-2010"; var cus = from x in _dataContext.testTable where x.CreateDate == Convert.ToDateTime(myDate) select x; The resulting SQL query generates and error because it returns the dates as "19/05/2010" which it interprets as an incorrect date. For some reason even though my system culture is set to en-GB it looks like it's trying to intrepret it as a en-US date. Any ideas how I get around this? Thanks. Alan T

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  • PHP Tag Cloud System

    - by deniz
    Hi, I am implementing a tag cloud system based on this recommendation. (However, I am not using foreign keys) I am allowing up to 25 tags. My question is, how can I handle editing on the items? I have this item adding/editing page: Title: Description: Tags: (example data) computer, book, web, design If someone edits an item details, do I need to delete all the tags from Item2Tag table first, then add the new elements? For instance, someone changed the data to this: Tags: (example data) computer, book, web, newspaper Do I need to delete all the tags from Item2Tag table, and then add these elements? It seems inefficient, but I could find a more efficient way. The other problem is with this way is, if someone edits description but does not change the tags box, I still need to delete all the elements from Item2Tag table and add the same element. I am not an experienced PHP coder, so could you suggest a better way to handle this? (pure PHP/MySQL solution is preferable) Thanks in advance,

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  • Technology stack for very frequent gps data collection

    - by gvaswani
    I am working on a project that involves gps data collection from many users (say 1000) every second (while they move). I am planning on using a dedicated database instance on EC2 with the mysql persistent block storage and run a ruby on rails application with nginx frontend. I haven't worked on such data collection application before. Am I missing something here? I will have a another instance which will act as application server and use the data from the same EBS. If anybody has dealt with such a system before, Any advise would be much appreciated?

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  • Multiple outliers for two variable linear regression

    - by Dave Jarvis
    Problem Building on my previous question, the "extreme" outliers in the following graph are somewhat obvious: Question Given: T - Set of all temperatures Y - Set of all years ST - Sum of temperatures. SY - Sum of years. N - Number of elements T(n) - Temperature of the nth element in the temperature set How would you implement an efficient MySQL stored procedure or user-defined function (UDF) to determine if T(n) is an outlier? (If such an implementation already exists, that would be good to know as well.) Related Sites I am slowly working through these sites to get a better understanding of the problem: Multiple Outliers Detection Procedures in Linear Regression M-estimator Measure of Surprise for Outlier Detection Ordinary Least Squares Linear Regression Many thanks!

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  • Adjust SQL query to DB2

    - by Guy Roth
    Part of a complex query that our app is running contains the lines: ...(inner query) SELECT ... NULL as column_A, NULL as column_B, ... FROM ... This syntax of creating columns with null values is not allowed in DB2 altough it is totally OK in MSSQL and Oracle DBs. Technically I can change it to: '' as column_A, '' as column_B, But this doesn't have exactly the same meaning and can damage our calculation results. How can I create columns with null values in DB2 using other syntax??

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  • news website with php and links

    - by mohammad reza
    newly i have created a news website, everything is based on php and mysql, NOW with more attention on other news website i see something wrong with my site in all of them when you are click on a news, that news open like a new page and in link bar you can see the link of that news like this: http://www.wired.com/wiredscience/2012/09/space-shuttle-endeavour-lands-in-los-angeles/ BUT in my website i have a page that named viewer.php and this page connected to database, when you are click on a news in my site you see something like this in link bar: www.example.com/viewer.php?ne_id=14 ne_id in my news table set specific number for a news like 14 and all of news (title, content and so on)saved on database how that site work? how to create like that site? i don't have any idea? if you know somthing (EVERYTHING) i need it please , i have really confused really sorry for my terrible english and thanks for your time

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  • Java or php tree structure problem

    - by agazerboy
    Hi All, I have all my data in my database. It has following 4 columns id source_clust target_clust result_clust 1 7 72 649 2 9 572 650 3 649 454 651 4 32 650 435 This data is like tree structure. source_clust and target_clust generate target_clust. target_clust can be source_clust or target_clust to make a new target_clust. Is there any php function or class that I can use to generate tree structure for my data???? I see this MySql site they are doing exactly what I need but I couldn't find how to implement that query in my data. Thanks ! Edited Is there any way in java to do it? if we have same data in array ??

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