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  • Ruby on Rails - Create Entity with Relationship

    - by SooDesuNe
    I'm new to rails, so be nice. I'm building a "rolodex" type application, and this question is about the best way to handle creating an entity along with several relationship entities at the same time. For (a contrived) example: My application will have a Person model, which has_one Contact_Info model. On the create.html.erb page for Person it makes sense for the user of my appliction to create the person, and the contact_info at the same time. It doesn't seem right to include details for creating a contact directly in the create view/controller for person. What's the rails way to handle this?

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  • mysqldump command not working?

    - by Harish Kurup
    I am using mysqldump to take backup of my database, but the command is not working.. the command i am using is mysqldump -u root dbname> 'c:\backupdatafolder\backup.sql' i am running this command in MySQL cli but not running,..is there any thing wrong in the command?

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  • Converting string to datetime

    - by duder
    I'm trying to enter a date in a mysql table `ssdate` datetime The function that produces the date can output it in 3 formats: 1276142400000 Thu Jun 10 00:00:00 GMT-0400 2010 Fri Jun 4 2010 I'm wondering which of these would be easiest to convert to this field format? Since I'm trying to save only the date, is there a better option than datetime that would work with one of these output formats?

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  • What is wrong with my SQL syntax here?

    - by CT
    New to SQL. I'm looking to create a IT asset database. Here is one of the tables created with php: mysql_query("CREATE TABLE software( id VARCHAR(30), PRIMARY KEY(id), software VARCHAR(30), key VARCHAR(30))") or die(mysql_error()); echo "Software Table Created.</br />"; This is the output from the browser when I run the script: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'VARCHAR(30))' at line 5 I am running a standard LAMP stack on Ubuntu Server 10.04. Thank you.

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  • How can i create a submitable form that contains dynamically added and removed controls

    - by bill
    Hi All, I am trying to create a form that is made up of controls with values that represent an entity with multiple child entities. The form will represent a product with multiple properties where the user will then be able to create options with multiple properties which in turn be able to create multiple option-items with multiple properties. My question is what is the best approach? Can i use ajax to avoid postbacks and having to rewrite the controls to the page? If i dynamically add the controls in the form of table rows or grid rows will the data/control values be available in the code-behind when i submit? This is an age old question.. the last time i had to do this was .Net 2.0, pre-ajax (for me) and i was forced to recreate all the controls on each post back. thanks!

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  • Which database and language is better at handling Unicode?

    - by user187809
    which database should I use, if my application is going to be in multiple languages (including Chinese, Japanese etc)? In other words, is MySQL better or worse than Postgres to handle unicode etc? (these are the only two databases my hosting company has) Also, which language is better for handling unicode? PHP or Ruby/Rails?

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  • PHP 5: What DAL are you using?

    - by overthetop
    hello I'm new to PHP and I recently started learning Zend Framework. What DAL are you using? Do you think that Zend_Db_* can do the magic? I need it mainly for MySql db. Does it have any limitations and can I use it in big project without any problems because I don't want to go the wrong way. 10x

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  • Specify database engine to use in fixtures

    - by deceze
    Is there a way to specify the database engine to be used for fixtures in CakePHP test fixtures? Some of my models depend on database transactions, and I would like to write some tests for their correct behavior. Currently I'm simply auto-importing the schema, but the tables get created with MySQL's standard MyISAM engine, which doesn't support transactions. class FooFixture extends CakeTestFixture { public $name = 'Foo'; public $import = 'Foo'; public $records = array(...); }

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  • internal implementation of database Queries

    - by harigm
    In my experience I have used many queries like select, order by, where clause etc.. in mysql, sql-server, oracle etc For a moment i have thought, 1)how is this internally written to implement the above queries 2) which language do they use? 3) is that programming language? if yes which language? 4)what kind of environment required to implement this kind of complex database

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  • Problem in Installing Wordpress

    - by Nasser Hajloo
    I try to install Wordpress in a Windows Client with WebPI which provided by Microsoft. Everything installed in my client and finally I saw successful message. with a lunch application link. When I click on it I see following error. Your PHP installation appears to be missing the MySQL extension which is required by WordPress. How Can I resolve this issue

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  • Preventing server-side scripting, XSS

    - by Tim
    Hey all Are there any pre-made scripts that I can use for PHP / MySQL to prevent server-side scripting and JS injections? I know about the typical functions such as htmlentities, special characters, string replace etc. but is there a simple bit of code or a function that is a failsafe for everything? Any ideas would be great. Many thanks :)

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  • What is the meanning of 'idx_categories_desc_categories_name' in osCommerce

    - by Sumant
    while working on osCommerce-3 i got the table structure for category & categories_description as CREATE TABLE IF NOT EXISTS `osc_categories` ( `categories_id` int(10) unsigned NOT NULL AUTO_INCREMENT, `categories_image` varchar(255) DEFAULT NULL, `parent_id` int(10) unsigned DEFAULT NULL, `sort_order` int(11) DEFAULT NULL, `date_added` datetime DEFAULT NULL, `last_modified` datetime DEFAULT NULL, PRIMARY KEY (`categories_id`), KEY `idx_categories_parent_id` (`parent_id`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=5 ; CREATE TABLE IF NOT EXISTS `osc_categories_description` ( `categories_id` int(10) unsigned NOT NULL, `language_id` int(10) unsigned NOT NULL, `categories_name` varchar(255) NOT NULL, PRIMARY KEY (`categories_id`,`language_id`), KEY `idx_categories_desc_categories_id` (`categories_id`), KEY `idx_categories_desc_language_id` (`language_id`), KEY `idx_categories_desc_categories_name` (`categories_name`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8; here i am not getting the meanning of indexing "idx_categories_desc_categories_id", "idx_categories_desc_language_id", "idx_categories_desc_categories_name" What is the use of this indexing.What does it mean?

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  • Advanced Form Validation in JavaScript

    - by Kaji
    I'm already familiar with how to use onSubmit to evaluate form content against RegEx to ensure it meets static parameters for acceptable content. What I'm wondering is if there is a way to further provide validation against a MySQL database, such as if you want to make sure an e-mail address hasn't been used yet before submitting a form and having to re-load the field data back into the proper places for correction.

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  • MySQL import in phpmyadmin (CSV) chokes on quotes

    - by Andrew Swift
    I am trying to import a .csv file into a MySQL table via phpMyAdmin. The .csv file is separated by pipes, formated like this: data|d'ata|d'a"ta|dat"a| data|"da"ta|data|da't'a| dat'a|data|da"ta"|da'ta| The data contains quotes. I have no control over the format in which I recieve the data -- it is generated by a third party. The problem comes when there is a | followed by a double quote. I always get an "invalid field count in CSV input on line N" error. I am uploading the file from the import page, using Latin1, CSV, terminated by |, separated by ". I would like to just change the "enclosed by" character, but I keep getting "Invalid parameter for CSV import: Fields enclosed by". I have tried various characters with no success. How can I tell MySQL to accept this format in phpMyAdmin? Setting up these tables is the first step in writing a program that will use uploaded gzipped .csv files to maintain the catalog of an e-commerce site.

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  • SQLite - ON DUPLICATE KEY UPDATE

    - by Alix Axel
    MySQL has something like this: INSERT INTO visits (ip, hits) VALUES ('127.0.0.1', 1) ON DUPLICATE KEY UPDATE hits = hits + 1; As far as I'm know this feature doesn't exist in SQLite, what I want to know is if there is any way to archive the same effect without having to execute two queries. Also, if this is not possible, what do you prefer: SELECT + (INSERT or UPDATE) or UPDATE (+ INSERT if UPDATE fails)

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  • Grouping Records with the same value

    - by Ben
    I am trying to create a conversations based messaging system. I want to group all messages that have the same conversation_id so that when I display a list of current conversations you only see the latest message from each conversation. Can I group the values in the mysql query, or would I have to do it in the php?

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  • SQL SELECT Join?

    - by SurfingCat
    Hello, i got a MySql DB. There is a table with products and orders. Structure: Products: product_id, name, manufacturers_id Orders: orders_id, product_id, quantitiy Now I want to get all orders (show only products where product id=1). I tried: SELECT orders.orders_id, orders.product_od FROM products, orders WHERE products.manufacturers_id = 1 GROUP BY orders_id ORDER BY orders_id But this doesnt work

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  • Date range intersection in SQL

    - by Will
    I have a table where each row has a start and stop date-time. These can be arbitrarily short or long spans. I want to query the sum duration of the intersection of all rows with two start and stop date-times. How can you do this in MySQL? Or do you have to select the rows that intersect the query start and stop times, then calculate the actual overlap of each row and sum it client-side?

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  • SQL query to retrieve financial year data grouped by the year

    - by mlevit
    Hi, I have a database with lets assume two columns (service_date & invoice_amount). I would like to create an SQL query that would retrieve and group the data for each financial year (July to June). I have two years of data so that is two financial years (i.e. 2 results). I know I can do this manually by creating an SQL query to group by month then run the data through PHP to create the financial year data but I'd rather have an SQL query. All ideas welcome. Thanks

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  • Dynamic sql vs stored procedures - pros and cons?

    - by skyeagle
    I have read many strong views (both for and against) SPs or DS. I am writing a query engine in C++ (mySQL backend for now, though I may decide to go with a C++ ORM). I cant decide whether to write a SP, or to dynamically creat the SQL and send the query to the db engine.# Any tips on how to decide?

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  • how understand one result set is subset of another in twomysql select result set ?

    - by Ehsan Khodarahmi
    Hi I've 2 mysql select statements, suppose these are my queries & their result : Statement 1 : select id from a which returns this result set : { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 } Statement 2 : select id from b which returns this result set : { 3, 5, 10 } I want to write a query which determines whether resultset1 contains all records of resultset2 or not. I think needs a simple query, any suggestion ???

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  • Loading .sql files from within PHP

    - by Josh Smeaton
    I'm creating an installation script for an application that I'm developing and need to create databases dynamically from within PHP. I've got it to create the database but now I need to load in several .sql files. I had planned to open the file and mysql_query it a line at a time - until I looked at the schema files and realised they aren't just one query per line. So, please.. how do I load an sql file from within PHP? (as phpMyAdmin does with it's import command).

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