Add github sql examples

Also wrapped up attempting to create the database.

examples/example_setup.rb

@@ -7,22 +7,33 @@ $:.unshift(lib_path)
 
 require "active_record"
 
-ActiveRecord::Base.establish_connection({
-  adapter: "mysql2",
-  database: "github_kv_test",
-})
+attempts = 0
+begin
+  ActiveRecord::Base.establish_connection({
+    adapter: "mysql2",
+    database: "github_store_test",
+  })
+  ActiveRecord::Base.connection.execute("DROP TABLE IF EXISTS `key_values`")
+  require "generators/github/store/templates/migration"
+  ActiveRecord::Migration.verbose = false
+  CreateKeyValuesTable.up
+rescue ActiveRecord::NoDatabaseError
+  raise if attempts >= 1
+  ActiveRecord::Base.establish_connection({
+    adapter: "mysql2",
+  })
+  ActiveRecord::Base.connection.execute("CREATE DATABASE `github_store_test`")
+  attempts += 1
+  retry
+end
 
-ActiveRecord::Base.connection.execute("DROP TABLE IF EXISTS `key_values`")
-ActiveRecord::Base.connection.execute(<<-EOS)
-  CREATE TABLE `key_values` (
+ActiveRecord::Base.connection.execute("DROP TABLE IF EXISTS `example_key_values`")
+ActiveRecord::Base.connection.execute(<<-SQL)
+  CREATE TABLE `example_key_values` (
     `id` bigint(20) NOT NULL AUTO_INCREMENT,
     `key` varchar(255) NOT NULL,
     `value` blob NOT NULL,
-    `created_at` datetime NOT NULL,
-    `updated_at` datetime NOT NULL,
-    `expires_at` datetime DEFAULT NULL,
     PRIMARY KEY (`id`),
-    UNIQUE KEY `index_key_values_on_key` (`key`),
-    KEY `index_key_values_on_expires_at` (`expires_at`)
+    UNIQUE KEY `index_key_values_on_key` (`key`)
   ) ENGINE=InnoDB DEFAULT CHARSET=utf8
-EOS
+SQL

examples/sql.rb

@@ -0,0 +1,44 @@
+require File.expand_path("../example_setup", __FILE__)
+require "github/sql"
+
+insert_statement = "INSERT INTO example_key_values (`key`, `value`) VALUES (:key, :value)"
+select_statement = "SELECT value FROM example_key_values WHERE `key` = :key"
+update_statement = "UPDATE example_key_values SET value = :value WHERE `key` = :key"
+delete_statement = "DELETE FROM example_key_values WHERE `key` = :key"
+
+################################# Class Style ##################################
+sql = GitHub::SQL.run insert_statement, key: "foo", value: "bar"
+p sql.last_insert_id
+# 1
+
+p GitHub::SQL.value select_statement, key: "foo"
+# "bar"
+
+sql = GitHub::SQL.run update_statement, key: "foo", value: "new value"
+p sql.affected_rows
+# 1
+
+sql = GitHub::SQL.run delete_statement, key: "foo"
+p sql.affected_rows
+# 1
+
+
+################################ Instance Style ################################
+sql = GitHub::SQL.new insert_statement, key: "foo", value: "bar"
+sql.run
+p sql.last_insert_id
+# 2
+
+sql = GitHub::SQL.new select_statement, key: "foo"
+p sql.value
+# "bar"
+
+sql = GitHub::SQL.new update_statement, key: "foo", value: "new value"
+sql.run
+p sql.affected_rows
+# 1
+
+sql = GitHub::SQL.new delete_statement, key: "foo"
+sql.run
+p sql.affected_rows
+# 1

lib/github/sql.rb

@@ -138,6 +138,7 @@ module GitHub
         query = nil
       end
 
+      @last_insert_id = nil
       @affected_rows  = nil
       @binds      = binds ? binds.dup : {}
       @query      = ""
@@ -241,7 +242,7 @@ module GitHub
 
     # Public: The last inserted ID for this connection.
     def last_insert_id
-      connection.raw_connection.last_insert_id
+      @last_insert_id || connection.raw_connection.last_insert_id
     end
 
     # Public: Map each row to an instance of an ActiveRecord::Base subclass.

test/test_helper.rb

@@ -6,12 +6,22 @@ require "timecop"
 require "minitest/autorun"
 require "mocha/mini_test"
 
-ActiveRecord::Base.establish_connection({
-  adapter: "mysql2",
-  database: "github_data_test",
-})
-
-ActiveRecord::Base.connection.execute("DROP TABLE IF EXISTS `key_values`")
-require "generators/github/store/templates/migration"
-ActiveRecord::Migration.verbose = false
-CreateKeyValuesTable.up
+attempts = 0
+begin
+  ActiveRecord::Base.establish_connection({
+    adapter: "mysql2",
+    database: "github_store_test",
+  })
+  ActiveRecord::Base.connection.execute("DROP TABLE IF EXISTS `key_values`")
+  require "generators/github/store/templates/migration"
+  ActiveRecord::Migration.verbose = false
+  CreateKeyValuesTable.up
+rescue ActiveRecord::NoDatabaseError
+  raise if attempts >= 1
+  ActiveRecord::Base.establish_connection({
+    adapter: "mysql2",
+  })
+  ActiveRecord::Base.connection.execute("CREATE DATABASE `github_store_test`")
+  attempts += 1
+  retry
+end