Created
October 31, 2020 08:10
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| package main | |
| type User struct { | |
| id int64 | |
| name string | |
| } | |
| type DB interface { | |
| GetUser(id int64) (*User, error) | |
| } | |
| type MemDB struct {} | |
| func (m *MemDB) GetUser(id int64) (*User, error) { | |
| ... | |
| } | |
| type PostgreDB struct {} | |
| func (p *PostgresDB) GetUser(id int64) (*User, error) { | |
| ... | |
| } | |
| func (p *PostgresDB) ListUsers(ids []int64) ([]*User, error) { | |
| ... | |
| } | |
| type Service struct { | |
| db DB | |
| } | |
| fuc main() { | |
| memDB := MemDB{} | |
| postgreDB := PostgreDB{} | |
| svc := Service{ | |
| db := &memDB // postgreDB로 대체 가능 | |
| } | |
| ... | |
| } |
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32번째 줄에 typo가 있네요~ fuc -> func