tryToSetValue() — gin Function Reference

Architecture documentation for the tryToSetValue() function in form_mapping.go from the gin codebase.

Function go DataBinding Validators calls 2 called by 1

Entity Profile

DataBinding→ Validators→ tryToSetValue() — gin Function Reference

Dependency Diagram

graph TD
  be2f0281_158f_19d5_81a3_7906a21c7875["tryToSetValue()"]
  ba99b96b_284d_628b_fac7_e9a63aea5c91["mapping()"]
  ba99b96b_284d_628b_fac7_e9a63aea5c91 -->|calls| be2f0281_158f_19d5_81a3_7906a21c7875
  b22872c8_095e_a558_ccc8_c2d9d844ebd4["head()"]
  be2f0281_158f_19d5_81a3_7906a21c7875 -->|calls| b22872c8_095e_a558_ccc8_c2d9d844ebd4
  28f27f7b_98e3_2633_4756_5d59d361ff59["TrySet()"]
  be2f0281_158f_19d5_81a3_7906a21c7875 -->|calls| 28f27f7b_98e3_2633_4756_5d59d361ff59
  style be2f0281_158f_19d5_81a3_7906a21c7875 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

binding/form_mapping.go lines 145–180

func tryToSetValue(value reflect.Value, field reflect.StructField, setter setter, tag string) (bool, error) {
	var tagValue string
	var setOpt setOptions

	tagValue = field.Tag.Get(tag)
	tagValue, opts := head(tagValue, ",")

	if tagValue == "" { // default value is FieldName
		tagValue = field.Name
	}
	if tagValue == "" { // when field is "emptyField" variable
		return false, nil
	}

	var opt string
	for len(opts) > 0 {
		opt, opts = head(opts, ",")

		if k, v := head(opt, "="); k == "default" {
			setOpt.isDefaultExists = true
			setOpt.defaultValue = v

			// convert semicolon-separated default values to csv-separated values for processing in setByForm
			if field.Type.Kind() == reflect.Slice || field.Type.Kind() == reflect.Array {
				cfTag := field.Tag.Get("collection_format")
				if cfTag == "" || cfTag == "multi" || cfTag == "csv" {
					setOpt.defaultValue = strings.ReplaceAll(v, ";", ",")
				}
			}
		} else if k, v = head(opt, "="); k == "parser" {
			setOpt.parser = v
		}
	}

	return setter.TrySet(value, field, tagValue, setOpt)
}