Support import of "choice" fields (#10361) (#10364)

- Perform reverse lookup of display value

(cherry picked from commit bbfdcdce73)

Co-authored-by: Oliver <oliver.henry.walters@gmail.com>

src/backend/InvenTree/importer/models.py

@@ -630,6 +630,38 @@ class DataImportRow(models.Model):
             if value is None and field in default_values:
                 value = default_values[field]
 
+            # If the field provides a set of valid 'choices', use that as a lookup
+            if field_type == 'choice' and 'choices' in field_def:
+                choices = field_def.get('choices', None)
+
+                if callable(choices):
+                    choices = choices()
+
+                # Try to match the provided value against the available choices
+                choice_value = None
+
+                for choice in choices:
+                    primary_value = choice['value']
+                    display_value = choice['display_name']
+
+                    if primary_value == value:
+                        choice_value = primary_value
+                        # Break on first match against a primary choice value
+                        break
+
+                    if display_value == value:
+                        choice_value = primary_value
+
+                    elif (
+                        str(display_value).lower().strip() == str(value).lower().strip()
+                        and choice_value is None
+                    ):
+                        # Case-insensitive match against display value
+                        choice_value = primary_value
+
+                if choice_value is not None:
+                    value = choice_value
+
             data[field] = value
 
         self.data = data