The task is to create a custom meta box to ask the user for the scripture text verse reference for each sermon. Of course, this can be done easily with custom fields, but expecting normal users to always type in the right key value might be problematic. Also, to the normal user, ‘custom fields’ sounds like something which shouldn’t be touched and might cause the whole system to implode.
Thus, I wanted a simple text field in the interface which is clearly labelled and only requires the data to be typed in.
The easy way is to use the More Fields plugin.
The plugin is very flexible and provides a nice graphical interface for creating meta boxes, customizing the fields which go into them as well as which post types they should appear on. However, it also seemed like way too much code and functionality for the simple task I wanted to do.