FIX: Can't update `Groups#allow_membership_requests` in admin.

app/controllers/admin/groups_controller.rb

@@ -71,6 +71,10 @@ class Admin::GroupsController < Admin::AdminController
     group.bio_raw = group_params[:bio_raw] if group_params[:bio_raw]
     group.full_name = group_params[:full_name] if group_params[:full_name]
 
+    if group_params[:allow_membership_requests]
+      group.allow_membership_requests = group_params[:allow_membership_requests]
+    end
+
     if group.save
       Group.reset_counters(group.id, :group_users)
 

spec/controllers/admin/groups_controller_spec.rb

@@ -88,14 +88,19 @@ describe Admin::GroupsController do
 
     it "ignore name change on automatic group" do
       expect do
-        xhr :put, :update, { id: 1, group: { name: "WAT", visible: "true" } }
-      end.to_not change { GroupHistory.count }
+        xhr :put, :update, { id: 1, group: {
+          name: "WAT",
+          visible: "true",
+          allow_membership_requests: "true"
+        } }
+      end.to change { GroupHistory.count }.by(1)
 
       expect(response).to be_success
 
       group = Group.find(1)
       expect(group.name).not_to eq("WAT")
       expect(group.visible).to eq(true)
+      expect(group.allow_membership_requests).to eq(true)
     end
 
     it "doesn't launch the 'automatic group membership' job when it's not retroactive" do

spec/integration/groups_spec.rb

@@ -84,6 +84,8 @@ describe "Groups" do
       end
 
       it "should be able update the group" do
+        group.update!(allow_membership_requests: false)
+
         expect do
           xhr :put, "/groups/#{group.id}", { group: {
             flair_bg_color: 'FFF',