Merge branch 'case-sensetivity-import' into 'master'

Fix import check for case sensetive namespaces

If you already have namespace `ABc` and you try to import project with namespace `abC` - import will fail with 422 error.

cc @valery

See merge request !1618

app/controllers/import/base_controller.rb

@@ -3,7 +3,7 @@ class Import::BaseController < ApplicationController
   private
 
   def get_or_create_namespace
-    existing_namespace = Namespace.find_by("path = ? OR name = ?", @target_namespace, @target_namespace)
+    existing_namespace = Namespace.find_by_path_or_name(@target_namespace)
 
     if existing_namespace
       if existing_namespace.owner == current_user

app/models/namespace.rb

@@ -48,6 +48,11 @@ class Namespace < ActiveRecord::Base
     where('lower(path) = :value', value: path.downcase).first
   end
 
+  # Case insensetive search for namespace by path or name
+  def self.find_by_path_or_name(path)
+    find_by("lower(path) = :path OR lower(name) = :path", path: path.downcase)
+  end
+
   def self.search(query)
     where("name LIKE :query OR path LIKE :query", query: "%#{query}%")
   end

spec/models/namespace_spec.rb

@@ -75,4 +75,14 @@ describe Namespace do
       expect(namespace.rm_dir).to be_truthy
     end
   end
+
+  describe :find_by_path_or_name do
+    before do
+      @namespace = create(:namespace, name: 'WoW', path: 'woW')
+    end
+
+    it { expect(Namespace.find_by_path_or_name('wow')).to eq(@namespace) }
+    it { expect(Namespace.find_by_path_or_name('WOW')).to eq(@namespace) }
+    it { expect(Namespace.find_by_path_or_name('unknown')).to eq(nil) }
+  end
 end