Include check constraints in structure.sql

See issue #2213

Author: Benjamin Burkhart

lib/active_record/connection_adapters/oracle_enhanced/structure_dump.rb

@@ -51,6 +51,7 @@ def structure_dump # :nodoc:
             structure << ddl
             structure << structure_dump_indexes(table_name)
             structure << structure_dump_unique_keys(table_name)
+            structure << structure_dump_check_constraints(table_name)
             structure << structure_dump_table_comments(table_name)
             structure << structure_dump_column_comments(table_name)
           end
@@ -161,6 +162,24 @@ def structure_dump_fk_constraints # :nodoc:
           join_with_statement_token(fks)
         end
 
+        def structure_dump_check_constraints(table)
+          keys = {}
+          check_constraints = select_all(<<~SQL.squish, "SCHEMA")
+              SELECT /*+ OPTIMIZER_FEATURES_ENABLE('11.2.0.2') */ c.CONSTRAINT_NAME, c.SEARCH_CONDITION
+                FROM all_constraints c
+               WHERE c.table_name = '#{table.upcase}'
+                 AND c.constraint_type = 'C'
+                 AND c.owner = SYS_CONTEXT('userenv', 'current_schema')
+                 AND c.generated = 'USER NAME'
+          SQL
+          check_constraints.each do |check_constraint|
+            keys[check_constraint["constraint_name"]] = check_constraint["search_condition"]
+          end
+          keys.map do |k, v|
+            "ALTER TABLE #{table.upcase} ADD CONSTRAINT #{k} CHECK (#{v})"
+          end
+        end
+
         def structure_dump_table_comments(table_name)
           comments = []
           comment = table_comment(table_name)

spec/active_record/connection_adapters/oracle_enhanced/structure_dump_spec.rb

@@ -215,6 +215,18 @@ class ::TestPost < ActiveRecord::Base
       expect(dump).to match(/CREATE TABLE "BARS" \(\n "ID" NUMBER\(38,0\) NOT NULL,\n "SUPER" RAW\(255\)/)
     end
 
+    it "should dump check constraints" do
+      @conn.execute <<~SQL
+        ALTER TABLE test_posts
+          add CONSTRAINT foo_is_json CHECK(foo is json)
+      SQL
+      dump = ActiveRecord::Base.connection.structure_dump_check_constraints("test_posts")
+      expect(dump).to eq(["ALTER TABLE FORM_SUBMISSIONS ADD CONSTRAINT FOO_IS_JSON CHECK (foo is json)"])
+
+      dump = ActiveRecord::Base.connection.structure_dump
+      expect(dump).to match(/ALTER TABLE FORM_SUBMISSIONS ADD CONSTRAINT FOO_IS_JSON CHECK \(foo is json\)/)
+    end
+
     it "should dump table comments" do
       comment_sql = %Q(COMMENT ON TABLE "TEST_POSTS" IS 'Test posts with ''some'' "quotes"')
       @conn.execute comment_sql