mapcast

mapcast

Convert map[string]string into map[string]interface using a reference struct to sniff types. Optionally can expect the struct's json tag names. Optionally can returned data to bson tag name.

WHY?

In order to use query string values as values in mongo db calls. That's my use case.

Cast

Casts map[string]string referencing any struct to map[string]interface

CastViaJson

Casts map[string]string referencing any struct to map[string]interface expecting json name in input

Respects the "-" flag.

CastViaJsonToBson

Casts map[string]string referencing any struct to map[string]interface expecting json name in input and returning bson field names in map

CastViaProtobufToBson

Casts map[string]string referencing any struct to map[string]interface expecting protobuf name in input and returning bson field names in map

Examples

type myStruct struct {
    Field int `json:"input_name" bson:"output_name"`
    Hidden float32 `json:"-" bson:"hidden_field"`
}

myInput := map[string]string{"input_name": "345"}

Cast(myInput, myStruct{}) 
// returns map{"Field" : 345}

CastViaJson(myInput, myStruct{}) 
// returns map{"input_name" : 345}

CastViaJsonToBson(myInput, myStruct{}) 
// returns map{"output_name" : 345}

myMultiInput := map[string][]string{"input_name" : []string{"345}}

CastMultiViaJsonToBson(myMultiInput, myStruct{}) 
// returns map{"output_name" : []int[345]}

Supported Types

It can convert to these types so far (againg ObjectId is here since my use case is mongo related)

• bool
• string
• int
• int8
• int16
• int32
• uint
• uint8
• uint16
• uint32
• float64
• float128
• bson.ObjectId