Merge pull request #36800 from jamespearson/matches_regex_mysql

Enabled matches_regex for MySql

activerecord/CHANGELOG.md

+*   Allow matches_regex on MySQL 
+
+    *James Pearson*
+    
 *   Allow specifying fixtures to be ignored by setting `ignore` in YAML file's '_fixture' section.
 
     *Tongfei Gao*

activerecord/lib/arel/visitors/mysql.rb

@@ -48,6 +48,14 @@ def visit_Arel_Nodes_IsDistinctFrom(o, collector)
           visit_Arel_Nodes_IsNotDistinctFrom o, collector
         end
 
+        def visit_Arel_Nodes_Regexp(o, collector)
+          infix_value o, collector, " REGEXP "
+        end
+
+        def visit_Arel_Nodes_NotRegexp(o, collector)
+          infix_value o, collector, " NOT REGEXP "
+        end
+
         # In the simple case, MySQL allows us to place JOINs directly into the UPDATE
         # query. However, this does not allow for LIMIT, OFFSET and ORDER. To support
         # these, we must use a subquery.

activerecord/test/cases/arel/visitors/mysql_test.rb

@@ -104,6 +104,52 @@ def compile(node)
           sql.must_be_like %{ NOT "users"."name" <=> NULL }
         end
       end
+
+      describe "Nodes::Regexp" do
+        before do
+          @table = Table.new(:users)
+          @attr = @table[:id]
+        end
+
+        it "should know how to visit" do
+          node = @table[:name].matches_regexp("foo.*")
+          node.must_be_kind_of Nodes::Regexp
+          compile(node).must_be_like %{
+            "users"."name" REGEXP 'foo.*'
+          }
+        end
+
+        it "can handle subqueries" do
+          subquery = @table.project(:id).where(@table[:name].matches_regexp("foo.*"))
+          node = @attr.in subquery
+          compile(node).must_be_like %{
+            "users"."id" IN (SELECT id FROM "users" WHERE "users"."name" REGEXP 'foo.*')
+          }
+        end
+      end
+
+      describe "Nodes::NotRegexp" do
+        before do
+          @table = Table.new(:users)
+          @attr = @table[:id]
+        end
+
+        it "should know how to visit" do
+          node = @table[:name].does_not_match_regexp("foo.*")
+          node.must_be_kind_of Nodes::NotRegexp
+          compile(node).must_be_like %{
+            "users"."name" NOT REGEXP 'foo.*'
+          }
+        end
+
+        it "can handle subqueries" do
+          subquery = @table.project(:id).where(@table[:name].does_not_match_regexp("foo.*"))
+          node = @attr.in subquery
+          compile(node).must_be_like %{
+            "users"."id" IN (SELECT id FROM "users" WHERE "users"."name" NOT REGEXP 'foo.*')
+          }
+        end
+      end
     end
   end
 end