feat: add change column default, add table comment

docs/docs/04-api/01-postgres/01-constructive.md

@@ -10,6 +10,8 @@ They are the operations that create, alter, or drop tables, columns, indexes, co
 
 - [AddColumnComment(tableName schema.TableName, columnName string, comment *string, opts ...schema.ColumnCommentOptions)](https://pkg.go.dev/github.com/alexisvisco/amigo/pkg/schema/pg#Schema.AddColumnComment)
 
+- [AddTableComment(tableName schema.TableName, comment *string, opts ...schema.TableCommentOptions)](https://pkg.go.dev/github.com/alexisvisco/amigo/pkg/schema/pg#Schema.AddTableComment) 
+
 - [AddCheckConstraint(tableName schema.TableName, constraintName string, expression string, opts ...schema.CheckConstraintOptions)](https://pkg.go.dev/github.com/alexisvisco/amigo/pkg/schema/pg#Schema.AddCheckConstraint)
 
 - [AddExtension(name string, option ...schema.ExtensionOptions)](https://pkg.go.dev/github.com/alexisvisco/amigo/pkg/schema/pg#Schema.AddExtension)

docs/docs/04-api/01-postgres/04-transformative.md

@@ -7,3 +7,5 @@ They are the operations that change the data in the database.
 - [RenameTable(tableName schema.TableName, newTableName string)](https://pkg.go.dev/github.com/alexisvisco/amigo/pkg/schema/pg#Schema.RenameTable)
 
 - [ChangeColumnType(tableName schema.TableName, columnName string, columnType schema.ColumnType, opts ...schema.ChangeColumnTypeOptions)](https://pkg.go.dev/github.com/alexisvisco/amigo/pkg/schema/pg#Schema.ChangeColumnType)
+
+- [ChangeColumnDefault(tableName schema.TableName, columnName string, defaultValue string, opts ...schema.ChangeColumnDefaultOptions)](https://pkg.go.dev/github.com/alexisvisco/amigo/pkg/schema/pg#Schema.ChangeColumnDefault)

docs/docs/index.md

@@ -3,7 +3,7 @@ sidebar_position: 1
 ---
 
 [![Go Report Card](https://goreportcard.com/badge/github.com/alexisvisco/amigo)](https://goreportcard.com/report/github.com/alexisvisco/amigo)
-[![GoDoc](https://pkg.go.dev/badge/alexisvisco/mig)](https://pkg.go.dev/alexisvisco/mig)
+[![GoDoc](https://pkg.go.dev/badge/alexisvisco/amigo)](https://pkg.go.dev/alexisvisco/mig)
 [![License](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT)
 [![GitHub release](https://img.shields.io/github/v/release/alexisvisco/amigo.svg)](https://github.com/alexisvisco/amigo/releases)
 [![Tests](https://github.com/alexisvisco/amigo/actions/workflows/tests.yml/badge.svg)](https://github.com/alexisvisco/amigo/actions/workflows/tests.yml)

pkg/schema/migrator_context.go

@@ -30,10 +30,12 @@ type MigrationEvents struct {
 	tablesCreated           []TableOptions
 	versionCreated          []string
 
-	columnsRenamed    []RenameColumnOptions
-	tablesRenamed     []RenameTableOptions
-	changeColumnTypes []ChangeColumnTypeOptions
-	columnComments    []ColumnCommentOptions
+	columnsRenamed       []RenameColumnOptions
+	tablesRenamed        []RenameTableOptions
+	changeColumnTypes    []ChangeColumnTypeOptions
+	columnComments       []ColumnCommentOptions
+	tableComments        []TableCommentOptions
+	changeColumnDefaults []ChangeColumnDefaultOptions
 
 	extensionsDropped            []DropExtensionOptions
 	tablesDropped                []DropTableOptions
@@ -183,3 +185,13 @@ func (m *MigratorContext) AddChangeColumnType(options ChangeColumnTypeOptions) {
 	m.MigrationEvents.changeColumnTypes = append(m.MigrationEvents.changeColumnTypes, options)
 	logger.Info(options)
 }
+
+func (m *MigratorContext) AddChangeColumnDefault(options ChangeColumnDefaultOptions) {
+	m.MigrationEvents.changeColumnDefaults = append(m.MigrationEvents.changeColumnDefaults, options)
+	logger.Info(options)
+}
+
+func (m *MigratorContext) AddTableComment(options TableCommentOptions) {
+	m.MigrationEvents.tableComments = append(m.MigrationEvents.tableComments, options)
+	logger.Info(options)
+}

pkg/schema/options.go

@@ -468,7 +468,7 @@ func (c ColumnCommentOptions) EventName() string {
 }
 
 func (c ColumnCommentOptions) String() string {
-	cmt := "nil"
+	cmt := "NULL"
 	if c.Comment != nil {
 		cmt = fmt.Sprintf("%q", *c.Comment)
 	}
@@ -580,6 +580,41 @@ func (c *ChangeColumnTypeOptions) IsArray() bool {
 	return c.Array
 }
 
+type ChangeColumnDefaultOptions struct {
+	Table      TableName
+	ColumnName string
+	Value      string
+
+	Reversible *ChangeColumnDefaultOptions
+}
+
+func (c *ChangeColumnDefaultOptions) EventName() string {
+	return "ChangeColumnDefaultEvent"
+}
+
+func (c *ChangeColumnDefaultOptions) String() string {
+	return fmt.Sprintf("-- change_column_default(table: %s, column: %s, value: %s)", c.Table, c.ColumnName, c.Value)
+}
+
+type TableCommentOptions struct {
+	Table   TableName
+	Comment *string
+
+	Reversible *TableCommentOptions
+}
+
+func (t TableCommentOptions) EventName() string {
+	return "TableCommentEvent"
+}
+
+func (t TableCommentOptions) String() string {
+	cmt := "NULL"
+	if t.Comment != nil {
+		cmt = fmt.Sprintf("%q", *t.Comment)
+	}
+	return fmt.Sprintf("-- comment_table(table: %s, comment: %s)", t.Table, cmt)
+}
+
 type PrimaryKeyConstraintOptions struct {
 	Table TableName
 
@@ -661,6 +696,8 @@ type TableOptions struct {
 	// Option is at the end of the table creation.
 	Option string
 
+	Comment *string
+
 	// TableDefinition is the definition of the table. Usually a struct that implements TableDef will allow you to
 	// define the columns and other options.
 	TableDefinition TableDef

pkg/schema/pg/postgres_column.go

@@ -194,7 +194,7 @@ func (p *Schema) AddTimestamps(tableName schema.TableName) {
 //
 // Example:
 //
-//	p.AddColumnComment("users", "name", schema.utils.Ptr("The name of the User"))
+//	p.AddColumnComment("users", "name", utils.Ptr("The name of the User"))
 //
 // Generates:
 //
@@ -397,6 +397,52 @@ func (p *Schema) ChangeColumnType(tableName schema.TableName, columnName string,
 	p.Context.AddChangeColumnType(options)
 }
 
+// ChangeColumnDefault changes the default value of a column.
+//
+// Example:
+//
+//	p.ChangeColumnDefault("users", "status", "'draft'")
+//
+// Generates:
+//
+//	ALTER TABLE "users" ALTER COLUMN "status" SET DEFAULT 'draft'
+func (p *Schema) ChangeColumnDefault(tableName schema.TableName, columnName, defaultValue string, opts ...schema.ChangeColumnDefaultOptions) {
+	options := schema.ChangeColumnDefaultOptions{}
+	if len(opts) > 0 {
+		options = opts[0]
+	}
+
+	options.Table = tableName
+	options.ColumnName = columnName
+	options.Value = defaultValue
+
+	if p.Context.MigrationDirection == types.MigrationDirectionDown {
+		if options.Reversible != nil {
+			p.rollbackMode().ChangeColumnDefault(tableName, columnName, options.Reversible.Value, *options.Reversible)
+		} else {
+			logger.Warn(events.MessageEvent{
+				Message: fmt.Sprintf("unable to recreate the column %s.%s", tableName, columnName),
+			})
+		}
+		return
+	}
+
+	query := "ALTER TABLE {table_name} ALTER COLUMN {column_name} SET DEFAULT {default}"
+	replacer := utils.Replacer{
+		"table_name":  utils.StrFunc(options.Table.String()),
+		"column_name": utils.StrFunc(options.ColumnName),
+		"default":     utils.StrFunc(options.Value),
+	}
+
+	_, err := p.DB.ExecContext(p.Context.Context, replacer.Replace(query))
+	if err != nil {
+		p.Context.RaiseError(fmt.Errorf("error while changing column default: %w", err))
+		return
+	}
+
+	p.Context.AddChangeColumnDefault(options)
+}
+
 func (p *Schema) toType(c schema.ColumnType, co schema.ColumnData) string {
 	p.modifyColumnOptionFromType(c, co)
 

pkg/schema/pg/postgres_column_test.go

@@ -220,6 +220,32 @@ CREATE TABLE IF NOT EXISTS {schema}.articles()
 
 }
 
+func TestPostgres_ChangeColumnDefault(t *testing.T) {
+	t.Parallel()
+
+	sc := "tst_pg_add_column_with_default"
+
+	base := `create table {schema}.articles(id integer);`
+
+	t.Run("simple change", func(t *testing.T) {
+		t.Parallel()
+		p, r, sc := baseTest(t, base, sc, 0)
+
+		p.ChangeColumnDefault(schema.Table("articles", sc), "id", "4")
+
+		testutils.AssertSnapshotDiff(t, r.FormatRecords(), true)
+	})
+
+	t.Run("null change", func(t *testing.T) {
+		t.Parallel()
+		p, r, sc := baseTest(t, base, sc, 1)
+
+		p.ChangeColumnDefault(schema.Table("articles", sc), "id", "null")
+
+		testutils.AssertSnapshotDiff(t, r.FormatRecords(), true)
+	})
+}
+
 func TestPostgres_DropColumn(t *testing.T) {
 	t.Parallel()
 

pkg/schema/pg/postgres_table.go

@@ -125,6 +125,10 @@ func (p *Schema) CreateTable(tableName schema.TableName, f func(*PostgresTableDe
 		return
 	}
 
+	if options.Comment != nil {
+		p.AddTableComment(tableName, options.Comment)
+	}
+
 	p.Context.AddTableCreated(options)
 
 	for _, afterCreate := range td.deferCreationAction {
@@ -470,3 +474,55 @@ func (p *Schema) RenameTable(oldTableName, newTableName schema.TableName) {
 
 	p.Context.AddTableRenamed(schema.RenameTableOptions{OldTable: oldTableName, NewTable: newTableName})
 }
+
+// AddTableComment adds a comment to a table in the database.
+//
+// Example:
+//
+//	p.AddTableComment("users", utils.Ptr("This table contains the users"))
+//
+// Generates:
+//
+//	COMMENT ON TABLE "users" IS 'This table contains the users'
+//
+// To remove a comment from a table:
+//
+//	p.AddTableComment("users", nil)
+//
+// Generates:
+//
+//	COMMENT ON TABLE "users" IS NULL
+func (p *Schema) AddTableComment(tableName schema.TableName, comment *string, opts ...schema.TableCommentOptions) {
+	options := schema.TableCommentOptions{}
+	if len(opts) > 0 {
+		options = opts[0]
+	}
+
+	options.Table = tableName
+	options.Comment = comment
+
+	if p.Context.MigrationDirection == types.MigrationDirectionDown && options.Reversible != nil {
+		p.rollbackMode().AddTableComment(tableName, options.Reversible.Comment)
+		return
+	}
+
+	sql := `COMMENT ON TABLE {table_name} IS {comment}`
+
+	replacer := utils.Replacer{
+		"table_name": utils.StrFunc(options.Table.String()),
+		"comment": func() string {
+			if options.Comment == nil {
+				return "NULL"
+			}
+			return fmt.Sprintf("'%s'", *options.Comment)
+		},
+	}
+
+	_, err := p.DB.ExecContext(p.Context.Context, replacer.Replace(sql))
+	if err != nil {
+		p.Context.RaiseError(fmt.Errorf("error while adding column comment: %w", err))
+		return
+	}
+
+	p.Context.AddTableComment(options)
+}

pkg/schema/pg/postgres_table_test.go

@@ -2,6 +2,7 @@ package pg
 
 import (
 	"github.com/alexisvisco/amigo/pkg/schema"
+	"github.com/alexisvisco/amigo/pkg/utils"
 	"github.com/alexisvisco/amigo/pkg/utils/testutils"
 	"github.com/stretchr/testify/require"
 	"testing"
@@ -118,6 +119,7 @@ func TestPostgres_CreateTable(t *testing.T) {
 			t.Serial("id")
 			t.String("title")
 		}, schema.TableOptions{
+			Comment:           utils.Ptr("This is a table without primary key"),
 			WithoutPrimaryKey: true,
 		})
 
@@ -126,7 +128,7 @@ func TestPostgres_CreateTable(t *testing.T) {
 			t.String("title")
 		})
 
-		testutils.AssertSnapshotDiff(t, r.FormatRecords(), true)
+		testutils.AssertSnapshotDiff(t, r.FormatRecords())
 		assertTableExist(t, p, schema.Table("articles", sc))
 		assertTableExist(t, p, schema.Table("articles_without_id", sc))
 	})
@@ -176,6 +178,38 @@ func TestPostgres_DropTable(t *testing.T) {
 	})
 }
 
+func TestPostgres_AddTableComment(t *testing.T) {
+	t.Parallel()
+
+	sc := "tst_pg_add_table_comment"
+
+	t.Run("add table comment", func(t *testing.T) {
+		t.Parallel()
+		p, r, sc := baseTest(t, "select 1;", sc, 0)
+
+		p.CreateTable(schema.Table("articles", sc), func(t *PostgresTableDef) {
+			t.Serial("id")
+		})
+
+		p.AddTableComment(schema.Table("articles", sc), utils.Ptr("This is a table of articles"))
+
+		testutils.AssertSnapshotDiff(t, r.FormatRecords())
+	})
+
+	t.Run("add table comment null", func(t *testing.T) {
+		t.Parallel()
+		p, r, sc := baseTest(t, "select 1;", sc, 1)
+
+		p.CreateTable(schema.Table("articles", sc), func(t *PostgresTableDef) {
+			t.Serial("id")
+		})
+
+		p.AddTableComment(schema.Table("articles", sc), nil)
+
+		testutils.AssertSnapshotDiff(t, r.FormatRecords())
+	})
+}
+
 func TestPostgres_RenameTable(t *testing.T) {
 	t.Parallel()
 

pkg/schema/pg/testdata/TestPostgres_AddTableComment/add_table_comment.snap.txt

@@ -0,0 +1,4 @@
+CREATE TABLE tst_pg_add_table_comment_0.articles (
+"id" SERIAL NOT NULL PRIMARY KEY
+)
+COMMENT ON TABLE tst_pg_add_table_comment_0.articles IS 'This is a table of articles'

pkg/schema/pg/testdata/TestPostgres_AddTableComment/add_table_comment_null.snap.txt

@@ -0,0 +1,4 @@
+CREATE TABLE tst_pg_add_table_comment_1.articles (
+"id" SERIAL NOT NULL PRIMARY KEY
+)
+COMMENT ON TABLE tst_pg_add_table_comment_1.articles IS NULL

pkg/schema/pg/testdata/TestPostgres_ChangeColumnDefault/null_change.snap.txt

@@ -0,0 +1 @@
+ALTER TABLE tst_pg_add_column_with_default_1.articles ALTER COLUMN id SET DEFAULT null

pkg/schema/pg/testdata/TestPostgres_ChangeColumnDefault/simple_change.snap.txt

@@ -0,0 +1 @@
+ALTER TABLE tst_pg_add_column_with_default_0.articles ALTER COLUMN id SET DEFAULT 4

pkg/schema/pg/testdata/TestPostgres_CreateTable/without_primary_key.snap.txt

@@ -2,6 +2,7 @@ CREATE TABLE tst_pg_create_table_5.articles (
 "id" SERIAL,
 "title" TEXT
 )
+COMMENT ON TABLE tst_pg_create_table_5.articles IS 'This is a table without primary key'
 CREATE TABLE tst_pg_create_table_5.articles_without_id (
 "title" TEXT
 )

readme.md

@@ -2,7 +2,7 @@
 [![AMIGO Logo](docs/static/img/logo.svg)](https://amigo.alexisvis.co)
 
 [![Go Report Card](https://goreportcard.com/badge/github.com/alexisvisco/amigo)](https://goreportcard.com/report/github.com/alexisvisco/amigo)
-[![GoDoc](https://pkg.go.dev/badge/alexisvisco/mig)](https://pkg.go.dev/alexisvisco/mig)
+[![GoDoc](https://pkg.go.dev/badge/alexisvisco/amigo)](https://pkg.go.dev/alexisvisco/mig)
 [![License](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT)
 [![GitHub release](https://img.shields.io/github/v/release/alexisvisco/amigo.svg)](https://github.com/alexisvisco/amigo/releases)
 [![Tests](https://github.com/alexisvisco/amigo/actions/workflows/tests.yml/badge.svg)](https://github.com/alexisvisco/amigo/actions/workflows/tests.yml)