Remove exec parameters

Closes #15

README.md

@@ -225,6 +225,36 @@ Rove is designed to be extensible via adapters. There are a few adapters built i
 
 You may also create your own adapters - see the `interface.go` file for interfaces your adapters must satisfy.
 
+### Best Practices
+
+When creating an adapter, will need:
+
+- Struct that satisfies the `rove.Changelog` interface.
+- Struct that satisfies the `rove.Transaction` interface.
+- Table or data structure called a `Changelog` to persistently track the changes made by the Rove.
+
+You should store the following fields (at a minimum) in your changelog. This will ensure your adapter can utilize all of the features of Rove.
+
+- id
+- author
+- filename
+- dataexecuted
+- orderexecuted
+- checksum
+- description
+- tag
+- version
+
+### Example Changelog
+
+Your changelog should look contain the same data as this table:
+
+| id | author | filename | dateexecuted | orderexecuted | checksum | description | tag | version |
+| --- | --- | --- | --- | --- | --- | --- | --- | --- |
+| 1 | josephspurrier | success.sql | 2019-01-12 16:04:16 | 1 | f0685b... | Create the user_status table. | NULL | 1.0 |
+| 2 | josephspurrier | success.sql | 2019-01-12 16:04:16 | 2 | 3f81b0... |  | NULL | 1.0 |
+| 3 | josephspurrier | success.sql | 2019-01-12 16:04:16 | 3 | 57cc0b... |  | NULL | 1.0 |
+
 ## Migration File Specifications
 
 There are a few components of a changeset:

interface.go

@@ -1,6 +1,6 @@
 package rove
 
-// Changelog represents a list of operations that can be run on a changelog.
+// Changelog represents a list of operations for a changelog.
 type Changelog interface {
 	// Initialize should perform any work to set up the changelog or return an
 	// error.
@@ -22,14 +22,6 @@ type Changelog interface {
 	Delete(id, author, filename string) error
 }
 
-// Changeset is a single changeset.
-type Changeset struct {
-	ID            string
-	Author        string
-	Filename      string
-	OrderExecuted int
-}
-
 // Transaction represents a changelog transaction.
 type Transaction interface {
 	// Commit should attempt to commit the changes to to the changelog or
@@ -38,5 +30,12 @@ type Transaction interface {
 	// Rollback should undo changes to the changelog after a failed commit.
 	Rollback() error
 	// Exec should prepare to make a change to the changelog.
-	Exec(query string, args ...interface{}) error
+	Exec(query string) error
+}
+
+// Changeset is a single changeset.
+type Changeset struct {
+	ID       string
+	Author   string
+	Filename string
 }

pkg/adapter/jsonfile/jsonfile.go

@@ -159,17 +159,15 @@ func (m *Info) Changesets(reverse bool) ([]rove.Changeset, error) {
 	for _, i := range results {
 		if reverse {
 			out = append([]rove.Changeset{{
-				Author:        i.Author,
-				Filename:      i.Filename,
-				ID:            i.ID,
-				OrderExecuted: i.OrderExecuted,
+				Author:   i.Author,
+				Filename: i.Filename,
+				ID:       i.ID,
 			}}, out...)
 		} else {
 			out = append(out, rove.Changeset{
-				Author:        i.Author,
-				Filename:      i.Filename,
-				ID:            i.ID,
-				OrderExecuted: i.OrderExecuted,
+				Author:   i.Author,
+				Filename: i.Filename,
+				ID:       i.ID,
 			})
 		}
 	}

pkg/adapter/jsonfile/transaction.go

@@ -1,5 +1,6 @@
 package jsonfile
 
+/*
 import (
 	"fmt"
 	"io/ioutil"
@@ -32,4 +33,4 @@ func (t *Transaction) Rollback() error {
 func (t *Transaction) Exec(query string, args ...interface{}) error {
 	t.data = fmt.Sprintf(query, args...)
 	return nil
-}
+}*/

pkg/adapter/mysql/mysql.go

@@ -130,10 +130,9 @@ func (m *MySQL) Changesets(reverse bool) ([]rove.Changeset, error) {
 	out := make([]rove.Changeset, 0)
 	for _, i := range results {
 		out = append(out, rove.Changeset{
-			Author:        i.Author,
-			Filename:      i.Filename,
-			ID:            i.ID,
-			OrderExecuted: i.OrderExecuted,
+			Author:   i.Author,
+			Filename: i.Filename,
+			ID:       i.ID,
 		})
 	}
 

pkg/adapter/mysql/transaction.go

@@ -25,7 +25,7 @@ func (t *Tx) Rollback() error {
 }
 
 // Exec will run a query on the database.
-func (t *Tx) Exec(query string, args ...interface{}) error {
-	_, err := t.db.Exec(query, args...)
+func (t *Tx) Exec(query string) error {
+	_, err := t.db.Exec(query)
 	return err
 }