为Joomla3组件创建虚拟内容

Question

I'm creating Joomla3 component and I need to create some dummy content during the installation, I know that I can use sql file to fill the tables, but this works mainly for custom created tables specific for my component. Problem arises when I want to add something to the #__content table, the 'alias' column isn't considered as unique and there can occur duplicate entries, if someone tries to install the component several times. I would like to know what is the best way to insert a record into #__content table without worrying about collateral damage like duplicate entries. Thanks all !

Answer 1

Solution 1 : You can use INSERT IGNORE so that while installing extension multiple times there will be no concern of duplicate entries.

Solution 2 : In Joomla there is a provision of script file which a component can have.

So, when an extension is installed/update/uninstall joomla triggers or calls certain predefined function like install, update, preflight, postflight etc available in the extension script file.

You can add install method in your extension script and execute this sql file on this method so that this will not be called on extension update case

Solution 3 : You can maintain a separate table in your database for this task and when you perform this dummy content creation you can mark this in your DB and further you can check whether this step has already done or not before initiating dummy content creation so that when someone install this extension multiple times this checking will prevent the same task to execute again and again.