How do I go about upgrading from CB 1.0 RC1 to RC2 without losing all fields, tabs and values?
Follow these steps:
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Backup - backup - backup (can't stress this enough) - code and database
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Write down all your parameter settings in the configuration tabs in your existing CB 1.0 RC1 setup (you can also see most of these in the ue_config.php file located in your administrator/components/com_comprofiler folder). You will need to manually reset all these parameters after upgrading because the process will over-write these settings in favour of the default settings of RC2.
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If you have added any extra language strings to your RC1 language file(s) you should also take a note of these changes because you will need to add them to the RC2 language file(s).
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From the Install Components backend select the com_comprofiler radio field and click on the uninstall button. This process will unistall all the RC1 code but it will not touch the various database tables and their content.
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Install the CB 1.0 RC2 comprofiler package via the Install Components backend. This process will upgrade any database tables needed without compromizing the table contents.
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Manually change all the parameter settings in the Comprofiler configuration panel to agree with the previous values noted in step 2.
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Manually change all comprofiler language file(s) with notes kept in step 3.
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All set!