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111 lines
2.5 KiB
Go
111 lines
2.5 KiB
Go
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package testfixtures
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import (
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"database/sql"
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"fmt"
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"os"
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"path"
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"unicode/utf8"
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"gopkg.in/yaml.v2"
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)
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// TableInfo is settings for generating a fixture for table.
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type TableInfo struct {
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Name string // Table name
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Where string // A condition for extracting records. If this value is empty, extracts all records.
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}
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func (ti *TableInfo) whereClause() string {
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if ti.Where == "" {
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return ""
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}
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return fmt.Sprintf(" WHERE %s", ti.Where)
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}
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// GenerateFixtures generates fixtures for the current contents of a database, and saves
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// them to the specified directory
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func GenerateFixtures(db *sql.DB, helper Helper, dir string) error {
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tables, err := helper.tableNames(db)
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if err != nil {
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return err
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}
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for _, table := range tables {
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filename := path.Join(dir, table+".yml")
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if err := generateFixturesForTable(db, helper, &TableInfo{Name: table}, filename); 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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// GenerateFixturesForTables generates fixtures for the current contents of specified tables in a database, and saves
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// them to the specified directory
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func GenerateFixturesForTables(db *sql.DB, tables []*TableInfo, helper Helper, dir string) error {
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for _, table := range tables {
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filename := path.Join(dir, table.Name+".yml")
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if err := generateFixturesForTable(db, helper, table, filename); 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 generateFixturesForTable(db *sql.DB, h Helper, table *TableInfo, filename string) error {
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query := fmt.Sprintf("SELECT * FROM %s%s", h.quoteKeyword(table.Name), table.whereClause())
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rows, err := db.Query(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([]interface{}, 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(map[string]interface{}, len(entries))
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for i, column := range columns {
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entryMap[column] = convertValue(entries[i])
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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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f, err := os.Create(filename)
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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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marshaled, 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(marshaled)
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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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}
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return value
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}
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