Exclude struct field from json.Marshal

[Jev Björsell]

Hello,

I'm using json.Marshal to convert a struct to Json, for the purpose of posting said json to a rest end point. 

The struct looks like this;

type Lead struct {

LeadNumber  string `json:"Lead_Number__c"`

FirstName   string

LastName    string

Company     string

Email       string

Description string

}

After the post, I get the same resource back in the response. 

I need to exclude the LeadNumber filed from the POST, as that field is read only, and assigned by the server. I want to read that same value back into my struct from the http.Response

How do I exclude a specific field from being converted when using json.Marshal? Keep in mind, I need to fill the field during json.Unmarshal.

Thanks!

-Jev 

[Andrew Gerrand]

You'll need to create two structs, I believe.

Andrew

-Jev 

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[Cem Ezberci]

If my understanding is correct, when you marshal the struct, LeadNumber will be empty because you wouldn't be posting it with a value there since the server is supposed to assign it. However, response will come back with LeadNumber populated with a value assigned by the server. To achieve what you want, changing the json tag for LeadNumber to read `json:"Lead_Number__c,omitempty"` should work just fine.

-Cem

[Jev Björsell]

,omitempty is exactly what I was looking for, and works great. Thanks!