How to Add a field to struct golang using JEN package where fields depend on JSON

Looping through the Json and getting the "name" field with tags and then adding it into a block of struct.
Required output after code generation

var queryOutput [][]struct {
		product_name string `db:"product_name" json:"product_name"`
		category     string `db:"category" json:"category"`
		category2    string `db:"category2" json:"category2"`
	}

for _, yaxis := range YAxisColumn {
		columns := yaxis.(map[string]interface{})
		columnName := columns["name"].(string)
		c:= jen.Id(utils.GetFormattedName(columnName)).Int().Tag(map[string]string{
			"json": GetFormattedName(columnName),
			"db":   GetFormattedName(columnName),
		}),
	}

Struct in which to add the Yaxis columns fields i.e name

return jen.Func().Id(serviceName).Params().Parens(
		jen.List(jen.Interface(), jen.Error()),
	).Block(
		jen.Var().Id("queryOutput").Op("[][]").Struct(
			jen.Id(utils.GetFormattedName(XAxisColumn)).String().Tag(map[string]string{
				"json": utils.GetFormattedName(XAxisColumn),
				"db":   utils.GetFormattedName(XAxisColumn),
			}),
),

JSON

"yAxisColumn" : [
                            {
                                "name": "category",
                                "color": ""
                            },
                            {
                                "name": "category2",
                                 "color":""
                            }
],

Use a function named as StructFunc in jen package.

Output after using

jen.Var().Id("queryOutput").Op("[]").StructFunc(
			func(g *jen.Group) {
				g.Add(jen.Id(utils.GetCamelCaseName(XAxisColumn)).String().Tag(map[string]string{
					"json": utils.GetFormattedName(XAxisColumn),
					"db":   utils.GetFormattedName(XAxisColumn),
				}))
				for _, yaxis := range YAxisColumn {
					columns := yaxis.(map[string]interface{})
					columnName := columns["name"].(string)
					c := jen.Id(utils.GetCamelCaseName(columnName)).Int().Tag(map[string]string{
						"json": utils.GetFormattedName(columnName),
						"db":   utils.GetFormattedName(columnName),
					})
					g.Add(c)
				}
			},
		),