uuid
2015-12-14
Parent:e0d83ad4145f
uuid/uuid.go
Fix build errors. Guess who screwed up and assumed UUID types were ID types? This guy. This corrects my mistake when casting to the underlying types to call the methods. Also, turns out the underlying type satisfies the Scan interface but not the Value interface, for whatever arbitrary reason. So reimplement our (very basic) Value interface.
| paddy@0 | 1 package uuid |
| paddy@0 | 2 |
| paddy@0 | 3 import ( |
| paddy@0 | 4 "database/sql/driver" |
| paddy@0 | 5 "errors" |
| paddy@0 | 6 |
| paddy@6 | 7 "github.com/pborman/uuid" |
| paddy@0 | 8 ) |
| paddy@0 | 9 |
| paddy@0 | 10 var InvalidIDError = errors.New("Invalid ID format.") |
| paddy@0 | 11 |
| paddy@0 | 12 type ID uuid.UUID |
| paddy@0 | 13 |
| paddy@0 | 14 func NewID() ID { |
| paddy@0 | 15 return ID(uuid.NewRandom()) |
| paddy@0 | 16 } |
| paddy@0 | 17 |
| paddy@2 | 18 func (id ID) String() string { |
| paddy@2 | 19 return uuid.UUID(id).String() |
| paddy@2 | 20 } |
| paddy@2 | 21 |
| paddy@4 | 22 func (id ID) IsZero() bool { |
| paddy@4 | 23 if id == nil { |
| paddy@4 | 24 return true |
| paddy@4 | 25 } |
| paddy@4 | 26 if len(id) == 0 { |
| paddy@4 | 27 return true |
| paddy@4 | 28 } |
| paddy@4 | 29 return false |
| paddy@4 | 30 } |
| paddy@4 | 31 |
| paddy@4 | 32 func (id ID) Copy() ID { |
| paddy@4 | 33 resp, _ := Parse(id.String()) |
| paddy@4 | 34 // ignore the error because they asked for a copy of the ID, they |
| paddy@4 | 35 // never asked if it was valid or not. |
| paddy@4 | 36 // This is, overall, not the most efficient way to do this (we're |
| paddy@4 | 37 // essentially converting to a string and then back again) but the |
| paddy@4 | 38 // computational complexity involved is pretty minor, and it allows |
| paddy@4 | 39 // us to respect the boundaries between the packages, using only the |
| paddy@4 | 40 // exported interfaces to perform a copy. And that seems pretty |
| paddy@4 | 41 // valuable. |
| paddy@4 | 42 return resp |
| paddy@4 | 43 } |
| paddy@4 | 44 |
| paddy@0 | 45 func (id ID) MarshalJSON() ([]byte, error) { |
| paddy@7 | 46 return uuid.UUID(id).MarshalJSON() |
| paddy@1 | 47 } |
| paddy@1 | 48 |
| paddy@0 | 49 func (id ID) Value() (driver.Value, error) { |
| paddy@7 | 50 return id.String(), nil |
| paddy@0 | 51 } |
| paddy@0 | 52 |
| paddy@0 | 53 func (id *ID) Scan(src interface{}) error { |
| paddy@7 | 54 return (*uuid.UUID)(id).Scan(src) |
| paddy@0 | 55 } |
| paddy@0 | 56 |
| paddy@0 | 57 func (id *ID) UnmarshalJSON(in []byte) error { |
| paddy@7 | 58 return (*uuid.UUID)(id).UnmarshalJSON(in) |
| paddy@1 | 59 } |
| paddy@1 | 60 |
| paddy@0 | 61 func Parse(in string) (ID, error) { |
| paddy@2 | 62 id := ID(uuid.Parse(in)) |
| paddy@2 | 63 if id == nil { |
| paddy@2 | 64 return id, InvalidIDError |
| paddy@0 | 65 } |
| paddy@2 | 66 return id, nil |
| paddy@0 | 67 } |
| paddy@0 | 68 |
| paddy@0 | 69 func (id ID) Equal(other ID) bool { |
| paddy@0 | 70 return uuid.Equal(uuid.UUID(id), uuid.UUID(other)) |
| paddy@0 | 71 } |