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168 lines
3.3 KiB
Go
Vendored
168 lines
3.3 KiB
Go
Vendored
package testfixtures
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import (
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"database/sql"
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"encoding/hex"
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"fmt"
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"os"
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"path/filepath"
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"unicode/utf8"
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"gopkg.in/yaml.v2"
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)
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// Dumper is resposible for dumping fixtures from the database into a
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// directory.
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type Dumper struct {
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db *sql.DB
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helper helper
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dir string
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tables []string
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}
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// NewDumper creates a new dumper with the given options.
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//
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// The "DumpDatabase", "DumpDialect" and "DumpDirectory" options are required.
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func NewDumper(options ...func(*Dumper) error) (*Dumper, error) {
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d := &Dumper{}
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for _, option := range options {
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if err := option(d); err != nil {
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return nil, err
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}
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}
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return d, nil
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}
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// DumpDatabase sets the database to be dumped.
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func DumpDatabase(db *sql.DB) func(*Dumper) error {
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return func(d *Dumper) error {
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d.db = db
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return nil
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}
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}
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// DumpDialect informs Loader about which database dialect you're using.
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//
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// Possible options are "postgresql", "timescaledb", "mysql", "mariadb",
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// "sqlite" and "sqlserver".
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func DumpDialect(dialect string) func(*Dumper) error {
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return func(d *Dumper) error {
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h, err := helperForDialect(dialect)
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if err != nil {
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return err
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}
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d.helper = h
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return nil
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}
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}
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// DumpDirectory sets the directory where the fixtures files will be created.
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func DumpDirectory(dir string) func(*Dumper) error {
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return func(d *Dumper) error {
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d.dir = dir
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return nil
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}
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}
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// DumpTables allows you to choose which tables you want to dump.
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//
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// If not informed, Dumper will dump all tables by default.
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func DumpTables(tables ...string) func(*Dumper) error {
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return func(d *Dumper) error {
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d.tables = tables
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return nil
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}
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}
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// Dump dumps the databases as YAML fixtures.
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func (d *Dumper) Dump() error {
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tables := d.tables
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if len(tables) == 0 {
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var err error
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tables, err = d.helper.tableNames(d.db)
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if err != nil {
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return err
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}
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}
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for _, table := range tables {
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if err := d.dumpTable(table); err != nil {
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return err
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}
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}
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return nil
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}
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func (d *Dumper) dumpTable(table string) error {
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query := fmt.Sprintf("SELECT * FROM %s", d.helper.quoteKeyword(table))
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stmt, err := d.db.Prepare(query)
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if err != nil {
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return err
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}
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defer stmt.Close()
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rows, err := stmt.Query()
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if err != nil {
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return err
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}
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defer rows.Close()
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columns, err := rows.Columns()
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if err != nil {
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return err
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}
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fixtures := make([]yaml.MapSlice, 0, 10)
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for rows.Next() {
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entries := make([]interface{}, len(columns))
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entryPtrs := make([]interface{}, len(entries))
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for i := range entries {
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entryPtrs[i] = &entries[i]
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}
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if err := rows.Scan(entryPtrs...); err != nil {
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return err
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}
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entryMap := make([]yaml.MapItem, len(entries))
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for i, column := range columns {
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entryMap[i] = yaml.MapItem{
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Key: column,
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Value: convertValue(entries[i]),
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}
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}
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fixtures = append(fixtures, entryMap)
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}
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if err = rows.Err(); err != nil {
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return err
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}
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filePath := filepath.Join(d.dir, table+".yml")
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f, err := os.Create(filePath)
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if err != nil {
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return err
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}
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defer f.Close()
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data, err := yaml.Marshal(fixtures)
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if err != nil {
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return err
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}
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_, err = f.Write(data)
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return err
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}
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func convertValue(value interface{}) interface{} {
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switch v := value.(type) {
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case []byte:
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if utf8.Valid(v) {
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return string(v)
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}
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return "0x" + hex.EncodeToString(value.([]byte))
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}
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return value
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}
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