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feat: migrate/rollback to the target version #808

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feat: migrate/rollback to the target version #808

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43a48c2
feat: migrate up / down to a target version
Mar 29, 2023
53d8ed8
feat: migrate up / down to a target version
Mar 29, 2023
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9 changes: 8 additions & 1 deletion migrate/migration.go
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Original file line number Diff line number Diff line change
Expand Up @@ -257,7 +257,8 @@ type MigrationFile struct {
//------------------------------------------------------------------------------

type migrationConfig struct {
nop bool
nop bool
targetVersion string
}

func newMigrationConfig(opts []MigrationOption) *migrationConfig {
Expand All @@ -276,6 +277,12 @@ func WithNopMigration() MigrationOption {
}
}

func WithTargetVersion(v string) MigrationOption {
return func(cfg *migrationConfig) {
cfg.targetVersion = v
}
}

//------------------------------------------------------------------------------

func sortAsc(ms MigrationSlice) {
Expand Down
34 changes: 34 additions & 0 deletions migrate/migrator.go
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Original file line number Diff line number Diff line change
Expand Up @@ -142,6 +142,19 @@ func (m *Migrator) Migrate(ctx context.Context, opts ...MigrationOption) (*Migra
}
migrations = migrations.Unapplied()

if cfg.targetVersion != "" {
versionValid := false
for _, m := range migrations {
if m.Name == cfg.targetVersion {
versionValid = true
break
}
}
if !versionValid {
return nil, fmt.Errorf("version not found")
}
}

group := new(MigrationGroup)
if len(migrations) == 0 {
return group, nil
Expand Down Expand Up @@ -171,6 +184,10 @@ func (m *Migrator) Migrate(ctx context.Context, opts ...MigrationOption) (*Migra
return group, err
}
}

if cfg.targetVersion != "" && cfg.targetVersion == migration.Name {
return group, nil
}
}

return group, nil
Expand All @@ -188,6 +205,19 @@ func (m *Migrator) Rollback(ctx context.Context, opts ...MigrationOption) (*Migr
return nil, err
}

if cfg.targetVersion != "" {
versionValid := false
for _, m := range migrations {
if m.Name == cfg.targetVersion {
versionValid = true
break
}
}
if !versionValid {
return nil, fmt.Errorf("version not found")
}
}

lastGroup := migrations.LastGroup()

for i := len(lastGroup.Migrations) - 1; i >= 0; i-- {
Expand All @@ -210,6 +240,10 @@ func (m *Migrator) Rollback(ctx context.Context, opts ...MigrationOption) (*Migr
return lastGroup, err
}
}

if cfg.targetVersion != "" && cfg.targetVersion == migration.Name {
return lastGroup, nil
}
}

return lastGroup, nil
Expand Down