Question 1

How to parse nested structs from form data in Go?

Accepted Answer

Use go-playground/form with field names like 'Address[0].Name' in your HTML form. The decoder automatically maps these to nested Go structs, handling slices and arrays seamlessly.

Question 2

go-playground/form vs gorilla/schema for form decoding

Accepted Answer

go-playground/form offers more advanced features like map support, custom type registration, and flexible array handling, while gorilla/schema is simpler and lighter. Choose Form for complex nested structures and Gorilla for basic needs.

Question 3

How to handle custom time formats in Go form parsing?

Accepted Answer

Register a custom type function using decoder.RegisterCustomTypeFunc to parse time in your desired format, such as '2006-01-02', overriding the default RFC3339 handling provided by the library.

Question 4

Does go-playground/form support map fields in forms?

Accepted Answer

Yes, it supports maps with keys specified in form fields like 'MapExample[key]', and can handle nested maps (e.g., 'NestedMap[key][key]'), decoding them into Go map types automatically.

Question 5

Best way to encode a Go struct to a query string

Accepted Answer

Use the Encoder from go-playground/form to convert your struct to url.Values, which can then be serialized into a query string. It handles nested structures, omits empty fields with omitempty tags, and avoids array indexes when possible.

Question 6

How to ignore fields when decoding forms with go-playground/form?

Accepted Answer

Add a `form:"-"` tag to the struct field, and the decoder will skip it during processing, ensuring sensitive or unnecessary data is not parsed from the form values.

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