Add context support (#46)

* add context support

* fix config

* fix circle config

* golang test to go1.10

.circleci/config.yml

@@ -6,15 +6,15 @@ jobs:
   build:
     docker:
       # specify the version
-      - image: circleci/golang:1.8
+      - image: circleci/golang:1.10
 
       # CircleCI PostgreSQL images available at: https://hub.docker.com/r/circleci/postgres/
       - image: circleci/mysql:5.7
         environment:
           MYSQL_ALLOW_EMPTY_PASSWORD: true
           MYSQL_DATABASE: core_test
           MYSQL_HOST: 127.0.0.1
-          MYSQL_ROOT_HOST: %
+          MYSQL_ROOT_HOST: '%'
           MYSQL_USER: root
 
       # Specify service dependencies here if necessary
@@ -31,7 +31,7 @@ jobs:
       - checkout
 
           # specify any bash command here prefixed with `run: `
-      - run: mysql -u root -e "CREATE DATABASE core_test DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci"
+      #- run: mysql -u root -e "CREATE DATABASE core_test DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci"
       - run: go get -u github.com/golang/lint/golint
       - run: go get -u github.com/wadey/gocovmerge
       - run: golint ./...

cache.go

@@ -1,3 +1,7 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package core
 
 import (

column.go

@@ -1,3 +1,7 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package core
 
 import (
@@ -41,6 +45,7 @@ type Column struct {
 	Comment         string
 }
 
+// NewColumn creates a new column
 func NewColumn(name, fieldName string, sqlType SQLType, len1, len2 int, nullable bool) *Column {
 	return &Column{
 		Name:            name,
@@ -66,7 +71,7 @@ func NewColumn(name, fieldName string, sqlType SQLType, len1, len2 int, nullable
 	}
 }
 
-// generate column description string according dialect
+// String generate column description string according dialect
 func (col *Column) String(d Dialect) string {
 	sql := d.QuoteStr() + col.Name + d.QuoteStr() + " "
 
@@ -94,6 +99,7 @@ func (col *Column) String(d Dialect) string {
 	return sql
 }
 
+// StringNoPk generate column description string according dialect without primary keys
 func (col *Column) StringNoPk(d Dialect) string {
 	sql := d.QuoteStr() + col.Name + d.QuoteStr() + " "
 
@@ -114,12 +120,13 @@ func (col *Column) StringNoPk(d Dialect) string {
 	return sql
 }
 
-// return col's filed of struct's value
+// ValueOf returns column's filed of struct's value
 func (col *Column) ValueOf(bean interface{}) (*reflect.Value, error) {
 	dataStruct := reflect.Indirect(reflect.ValueOf(bean))
 	return col.ValueOfV(&dataStruct)
 }
 
+// ValueOfV returns column's filed of struct's value accept reflevt value
 func (col *Column) ValueOfV(dataStruct *reflect.Value) (*reflect.Value, error) {
 	var fieldValue reflect.Value
 	fieldPath := strings.Split(col.FieldName, ".")

converstion.go

@@ -1,3 +1,7 @@
+// Copyright 2019 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
 package core
 
 // Conversion is an interface. A type implements Conversion will according