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Add helpers for slice of Map #102

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Merged
merged 2 commits into from
Feb 8, 2021
Merged

Add helpers for slice of Map #102

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215aca1
Add helpers for slice of Map
vyskocilm Feb 4, 2021
3655c58
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hanzei Feb 8, 2021
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28 changes: 28 additions & 0 deletions map.go
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Original file line number Diff line number Diff line change
Expand Up @@ -92,6 +92,18 @@ func MustFromJSON(jsonString string) Map {
return o
}

// MustFromJSONSlice creates a new slice of Map containing the data specified in the
// jsonString. Works with jsons with a top level array
//
// Panics if the JSON is invalid.
func MustFromJSONSlice(jsonString string) []Map {
slice, err := FromJSONSlice(jsonString)
if err != nil {
panic("objx: MustFromJSONSlice failed with error: " + err.Error())
}
return slice
}

// FromJSON creates a new Map containing the data specified in the
// jsonString.
//
Expand All @@ -106,6 +118,22 @@ func FromJSON(jsonString string) (Map, error) {
return m, nil
}

// FromJSONSlice creates a new slice of Map containing the data specified in the
// jsonString. Works with jsons with a top level array
//
// Returns an error if the JSON is invalid.
func FromJSONSlice(jsonString string) ([]Map, error) {
var slice []Map
err := json.Unmarshal([]byte(jsonString), &slice)
if err != nil {
return nil, err
}
for _, m := range slice {
m.tryConvertFloat64()
}
return slice, nil
}

func (m Map) tryConvertFloat64() {
for k, v := range m {
switch v.(type) {
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19 changes: 19 additions & 0 deletions map_test.go
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Expand Up @@ -225,3 +225,22 @@ func TestMapFromURLQueryWithError(t *testing.T) {
objx.MustFromURLQuery("%")
})
}

func TestJSONTopLevelSlice(t *testing.T) {
slice, err := objx.FromJSONSlice(`[{"id": 10000001}, {"id": 42}]`)

assert.NoError(t, err)
require.Len(t, slice, 2)
assert.Equal(t, 10000001, slice[0].Get("id").MustInt())
assert.Equal(t, 42, slice[1].Get("id").MustInt())
}

func TestJSONTopLevelSliceWithError(t *testing.T) {
slice, err := objx.FromJSONSlice(`{"id": 10000001}`)

assert.Error(t, err)
assert.Nil(t, slice)
assert.Panics(t, func() {
_ = objx.MustFromJSONSlice(`{"id": 10000001}`)
})
}