got categories from wrong source

backend/maintenance/api_maint_test.go

@@ -96,8 +96,12 @@ func TestGetMDSkillCategories(t *testing.T) {
 	ski := models.Skill{}
 	categories, err := ski.GetSkillCategories()
 	assert.NoError(t, err)
-	assert.LessOrEqual(t, 1, len(categories))
-	assert.Equal(t, "Wissen", categories[0])
+	assert.GreaterOrEqual(t, len(categories), 1, "Should have at least one skill category")
+	// Check that categories come from learning_skill_categories table
+	assert.Contains(t, categories, "Alltag", "Should contain 'Alltag' category")
+	assert.Contains(t, categories, "Wissen", "Should contain 'Wissen' category")
+	assert.Contains(t, categories, "Kampf", "Should contain 'Kampf' category")
+	assert.Contains(t, categories, "Schilde und Parierwaffen", "Should contain 'Schilde und Parierwaffen' category")
 }
 
 func TestGetMDSkills(t *testing.T) {

backend/models/model_gsmaster.go

@@ -231,10 +231,9 @@ func (object *Skill) GetSkillCategories() ([]string, error) {
 	var categories []string
 	gameSystem := "midgard"
 
-	result := database.DB.Model(&Skill{}).
-		Where("game_system = ? and category is not null", gameSystem).
-		Distinct().
-		Pluck("category", &categories)
+	result := database.DB.Model(&SkillCategory{}).
+		Where("game_system = ?", gameSystem).
+		Pluck("name", &categories)
 
 	if result.Error != nil {
 		return nil, result.Error
@@ -376,10 +375,9 @@ func (object *Spell) GetSpellCategories() ([]string, error) {
 	var categories []string
 	gameSystem := "midgard"
 
-	result := database.DB.Model(&Spell{}).
-		Where("game_system=? and category is not null", gameSystem).
-		Distinct().
-		Pluck("category", &categories)
+	result := database.DB.Model(&SpellSchool{}).
+		Where("game_system = ?", gameSystem).
+		Pluck("name", &categories)
 
 	if result.Error != nil {
 		return nil, result.Error