On Thu, Sep 3, 2020 at 2:32 PM Alexander Mills
<alexander.d.mi...@gmail.com> wrote:
>
> I was under the impression it wouldn't omit the array if it had zero length,
> hence my question..
> i mean at some point we want an empty array in JSON, so I assume it's
> included by default
If you define boolField as a type, then you can have a custom
marshaler that checks array sizes, something like this:
func (b boolField) MarshalJSON() ([]byte,error) {
data:=map[string]interface{}{}
if len(b.Must)>0 {
data["must"]=b.Must
}
...
return json.Marshal(data)
}
>
> On Thursday, September 3, 2020 at 3:35:05 AM UTC-7 nishanth...@gmail.com
> wrote:
>>
>> > how do I omit an array on boolField if the array is empty?
>>
>> Do you mean how to omit an empty array's field in the serialized JSON? If
>> so, you can use "omitempty" like you did in the other type.
>>
>> var boolField struct {
>> Must []HasTermOrMatch `json:"must,omitempty"`
>> MustNot []HasTermOrMatch `json:"must_not,omitempty"`
>> Filter []HasTermOrMatch `json:"filter,omitempty"`
>> Should []HasTermOrMatch `json:"should,omitempty"`
>> }
>>
>> This should omit the slice field in the serialized JSON if the slice is nil
>> or zero length.
>> On Thursday, September 3, 2020 at 1:08:00 AM UTC+5:30 Alexander Mills wrote:
>>>
>>> I have this code used to construct an ElasticSearch json query:
>>>
>>> ```
>>> type Term = map[string]interface{}
>>> type QueryString = map[string]interface{}
>>> type Range = map[string]interface{}
>>> type Match = map[string]string
>>>
>>> type HasTermOrMatch = struct {
>>> Term `json:"term,omitempty"`
>>> QueryString `json:"query_string,omitempty"`
>>> Match `json:"match,omitempty"`
>>> Range `json:"range,omitempty"`
>>> }
>>>
>>> var boolField struct {
>>> Must []HasTermOrMatch `json:"must"`
>>> MustNot []HasTermOrMatch `json:"must_not"`
>>> Filter []HasTermOrMatch `json:"filter"`
>>> Should []HasTermOrMatch `json:"should"`
>>> }
>>> ```
>>>
>>> my question is - how do I omit an array on boolField if the array is empty?
>>>
>>> I hear there might be an interface I can add something like this:
>>>
>>>
>>> func (v Match) IsZero() bool {
>>> return len(v) < 1
>>> }
>>>
>>> func (v Term) IsZero() bool {
>>> return len(v) < 1
>>> }
>>>
>>> func (v Range) IsZero() bool {
>>> return len(v) < 1
>>> }
>>>
>>> func (v QueryString) IsZero() bool {
>>> return len(v) < 1
>>> }
>>>
>>>
>>> anyone know how to do this?
>>> thanks
>>> -alex
>>>
>>>
>>>
>>>
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