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  • Django database - how to add this column in raw SQL.

    - by alex
    Suppose I have my models set up already. class books(models.Model): title = models.CharField... ISBN = models.Integer... What if I want to add this column to my table? user = models.ForeignKey(User, unique=True) How would I write the raw SQL in my database so that this column works?

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  • ID generator with local static variable - thread-safe?

    - by Poseidon
    Will the following piece of code work as expected in a multi-threaded scenario? int getUniqueID() { static int ID=0; return ++ID; } It's not necessary that the IDs to be contiguous - even if it skips a value, it's fine. Can it be said that when this function returns, the value returned will be unique across all threads?

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  • Creating Auto Incrementing column in Google Appengine

    - by demos
    What is the easiest and most efficient way to create an auto-increment counter for every data row in google appengine? basically I want to give every row a unique row_number so that I can overcome the issue of only being able to get the first 1000 results in a select query. I can thus add a counter lies between condition and mine all the entires in the table.

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  • MySql TEXT column?

    - by acidzombie24
    I ran this using MySql and it appears to not like TEXT. With SQL server i use nvarchar(max) What should i use in MySQL? In other tables some fields will be descriptions and may be long so ATM i am thinking fixed length is bad. create table if not exists misc_info ( id INTEGER PRIMARY KEY AUTO_INCREMENT NOT NULL, key TEXT UNIQUE NOT NULL, value TEXT NOT NULL)ENGINE=INNODB;

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  • Symfony: how would you reverse the "notnull:true" in a schema of a plugin?

    - by user248959
    Hi, sfGuardUser model of sfDoctrineGuardPlugin is defined this way: sfGuardUser: actAs: [Timestampable] columns: id: type: integer(4) primary: true autoincrement: true username: type: string(128) notnull: true unique: true As you can see 'username' has the feature "notnull:true". Now i want to create a register form that is not using 'username' but the email address of the user. When a user wants to register, it is showed this: Validation failed in class sfGuardUser 1 field had validation error: * 1 validator failed on username (notnull) Any idea? Javi

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  • Does Doctrine 1.2 support importing indexes with Doctrine_Core::generateModelsFromDb function?

    - by Coagulant
    Does Doctrine 1.2 support importing indexes with Doctrine_Core::generateModelsFromDb() function? I need to make a migration between 2 database connections, one of them having unique index on 2 fields and one doesn't. And my migration is empty. It looks like Doctrine doesn't support indexes when importing from databae, other than those tied to relationship foreign keys. $changes = Doctrine_Core::generateMigrationsFromDiff($migrationsPath, array('doctrineOld'), array('doctrine'));

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  • The least amount of code possible for this MySQL query?

    - by ddan
    I have a MySQL query that: gets data from three tables linked by unique id's. counts the number of games played in each category, from each user and counts the number of games each user has played that fall under the "fps" category It seems to me that this code could be a lot smaller. How would I go about making this query smaller. http://sqlfiddle.com/#!2/6d211/1 Any help is appreciated even if you just give me links to check out.

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  • Need a MYSQL query to compare two tables and only output non matching results

    - by ee12csvt
    I have two tables in my database, one contains a list of items with other information on these items. The other table is contains a list of photographs of these items. The items table gives each item a unique identifier,which is used in the photographs table to identifier which item has been photographed. I need to output a list of items that are not linked to a photograph in the second table. Any ideas on how I can do this?

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  • How can I change the `invalid` message of doctrine?

    - by roddik
    Hi. I'm using symfony with doctrine and I make a registration form. Email field is declared unique and if I set it to already existing one, I get the message An object with the same "email" already exist.. I use the following validator: $this->validatorSchema['email'] = new sfValidatorEmail(array('required' => true), array('invalid' => 'Does not seem to be a proper email')); How can I change the "already exists" message? Thanks

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  • Why thread specific data is required in pthread ?

    - by user504542
    Hi As i know, all the threads share memory location. For example a global variable changes in one thread will reflect in another thread. Since each thread has its own stack, the local variables that are created inside the thread is unique. In this case, why do we need to go for thread specific data mechanism?. Can't it be achieved by auto storage varibles inside the thread function ? Kindly clarify!!!. BR Rj

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  • Making a python script only be able to run once at a time

    - by Richard
    I am looking to make a python script be unique in the sense that it can only run once at a time. For example if I run the script and open another session of the same script a second time and the first session is still running, then the second session will just exit and do nothing. Anyone knows how I could implement this?

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  • Persistent Hashing of Strings in Python

    - by Chris S
    How would you convert an arbitrary string into a unique integer, which would be the same across Python sessions and platforms? For example hash('my string') wouldn't work because a different value is returned for each Python session and platform.

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  • jQuery syntax for changing the value of a table cell

    - by cf_PhillipSenn
    I have a table where every row has a unique id. The last table cell has class="status" where I want to show the user the result of their action. In my $.ajax call, I have: ,success: function(result){ $('tr#'+result).td('.status').text('Updated'); }; result is the id of the row that was updated. It's just throwing an error message that says $( and that's all.

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  • Python: Sort a dictionary by value

    - by the empirical programmer
    I have a dictionary of values read from 2 fields in a database: a string field and a numeric field. The string field is unique so that is the key of the dictionary. I can sort on the keys, but how can I sort based on the values? Note: I have read this post 72899 and probably could change my code to have a list of dictionaries but since I do not really need a list of dictionaries I wanted to know if there a simpler solution.

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  • which database to use

    - by ranjanarr
    I am developing an App in which I need to authenticate password, store user personal information and setting details / preferences. All these are user-mobile specific or rather App specific and are unique for each user,the password and settings info should not be lost once phone is switched off or user exits the App, which data storage rocedure is recommended for such App?

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  • Need help with a SQL Query

    - by Jack
    I have created a table with the following structure- $sql = "CREATE TABLE followers ( uid int UNSIGNED NOT NULL UNIQUE, PRIMARY KEY(uid), follower_count int UNSIGNED , is_my_friend bool, status_count int UNSIGNED, location varchar(50) )"; I need to find the uid of the person with max(status_count+follower_count) and whose is_my_friend = 1 I wrote the following query but I ain't getting the correct uid. SELECT p.uid FROM (select uid,is_my_friend,max(follower_count+status_count) from followers) p WHERE p.is_my_friend = 1;

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