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Author Topic: Foreign Keys Out of Control  (Read 2036 times)

Matt2000

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Foreign Keys Out of Control
April 17, 2008, 12:39:50 pm
It seems like every time I turn around, CiviCRM is hindering my progress due to unnecessary FK restraint.

Today I'm trying to mass import (via a CSV into phpmyadmin) a bunch of option values into the civicrm_option_value table, and I'm getting a FK error on the component_id table, even though every existing row is NULL, just like my import file. It seems this column is not being used, and still it has a FK restraint?

Are there any plans to reduce the number of FK restraints? Admittedly, I don't entirely understand their purpose, except to prevent errors, but anyone who's hacking the database directly should know enough not to cause irreparable damage.

I've coined a new term for these: Foreign Unnecessary CiviCRM Keys. But usually I just use the acronym.
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Donald Lobo

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Re: Foreign Keys Out of Control
April 17, 2008, 10:35:21 pm

foreign keys are your friend and will save you in quite a few instances. I dont think we'll ever reduce the number of FK restraints (2.0 introduced quite a few more constraints). We are also fans of strong typing and initializing variables before they are used :)

Can you cut-n-paste your sql insert statement which shows this error. the component_id is optional and hence can be NULL. ensure you dont include it in your insert statement

lobo
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Matt2000

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Re: Foreign Keys Out of Control
April 17, 2008, 11:54:05 pm
I re-wrote the SQL to work around, and I don't think I can get back to the SQL that was generated by the phpmyadmin CSV import. It's possible that feature is buggy and phpmyadmin is to blame, but I run into FK errors so often in CiviCRM (mainly when upgrading), that it seems like something is not right.
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mcsmom

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Re: Foreign Keys Out of Control
April 27, 2008, 01:15:11 am
I think it is the order that the tables are in when doing your backup.  Even when I back up with no foreign keys there are still always many places I have to stop and start because of FK when moving a civicrm database.
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