Module development and code questions

I have two list. Value in second list changes when you select something from first list. How to get value user select from list.

Dear Drupal-Community,

i want to developing a custom field module for spatial field types (geofield and geolocation are not enough, because i can not use real spatial functions with them). So mysql, mariadb and postgres are supporting the column types point, line and polygon. So now i want to know, how i can add a custom datatype. Is this possible and have you got a tutorial for this realizing this idea?

thanks a lot

andy

Hi there,

自定义一个字段，是可以用来填写ip地址的，请问有人懂吗？

I have a controller that lists certain category items. Depending on the category, the sort/filter form is dynamically changed. I've implemented this with a simple factory method called from the controller i.e. $filterForm = FilterForm_Factory::create($category);

The problem is you cannot edit/access form properties from within the controller e.g. to set the selected options on the form after submit. 

Dear Drupal gurus,