Make GeometryField.geodetic() case insensitive

[olivergeorge@…]

The current implementation is quite fragile with regards to case sensitivity. The proposed patch makes it operate in a case insensitive manner.

This became an issue while working on a spatial backend for Microsoft SQL Server. The WKT string they use capitalises the unit name (e.g. "Degree") which doesn't match any entries in the GeometryField.geodetic_units list. The default values don't follow a case convention making it hard to work around without a patch. Are

The proposed change makes two specific updates:

• default values in GeometryField.geodetic_units are now all lower case
• GeometryField.geodetic() to test against lower case unit name

​https://github.com/django/django/pull/2195/files

[Claude Paroz <claude@…>]

In a4fbdcdf660fe1f032a332fb51ad37104117b41f:

Fixed #21850 -- Made GeometryField.geodetic case insensitive