| package migrate |
| |
| import ( |
| "fmt" |
| "io/ioutil" |
| "log" |
| "strings" |
| ) |
| |
| func ExampleNewMigration() { |
| // Create a dummy migration body, this is coming from the source usually. |
| body := ioutil.NopCloser(strings.NewReader("dumy migration that creates users table")) |
| |
| // Create a new Migration that represents version 1486686016. |
| // Once this migration has been applied to the database, the new |
| // migration version will be 1486689359. |
| migr, err := NewMigration(body, "create_users_table", 1486686016, 1486689359) |
| if err != nil { |
| log.Fatal(err) |
| } |
| |
| fmt.Print(migr.LogString()) |
| // Output: |
| // 1486686016/u create_users_table |
| } |
| |
| func ExampleNewMigration_nilMigration() { |
| // Create a new Migration that represents a NilMigration. |
| // Once this migration has been applied to the database, the new |
| // migration version will be 1486689359. |
| migr, err := NewMigration(nil, "", 1486686016, 1486689359) |
| if err != nil { |
| log.Fatal(err) |
| } |
| |
| fmt.Print(migr.LogString()) |
| // Output: |
| // 1486686016/u <empty> |
| } |
| |
| func ExampleNewMigration_nilVersion() { |
| // Create a dummy migration body, this is coming from the source usually. |
| body := ioutil.NopCloser(strings.NewReader("dumy migration that deletes users table")) |
| |
| // Create a new Migration that represents version 1486686016. |
| // This is the last available down migration, so the migration version |
| // will be -1, meaning NilVersion once this migration ran. |
| migr, err := NewMigration(body, "drop_users_table", 1486686016, -1) |
| if err != nil { |
| log.Fatal(err) |
| } |
| |
| fmt.Print(migr.LogString()) |
| // Output: |
| // 1486686016/d drop_users_table |
| } |