如何在GoFiber中从前端的POST数据中强制执行正确的数据类型？

huangapple
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英文:

how do i enforce the proper data types on gofiber golang from POST data from frontend?

问题

我正在从React前端接收到以下POST请求的JSON数据：

  1. {
  2. 	"field_one": "first",
  3. 	"field_two": "second",
  4. 	"field_three": "3.00"
  5. }

但是在处理请求之前，我希望使用Golang将其转换为以下格式：

  1. {
  2. 	"field_one": "first",
  3. 	"field_two": "second",
  4. 	"field_three": 3.00
  5. }

我想将field_three从字符串转换为float64，但是我无法让Golang接受字符串并处理正确的数据类型。

这是我处理POST请求数据的Golang函数：

  1. func PostCreate(c *fiber.Ctx) error {
  2. 	
  3. 	type PostCreateData struct {
  4. 		fieldOne       string  `json:"field_one" form:"field_one" validate:"required"`
  5. 		fieldTwo       string  `json:"field_two" form:"field_two" validate:"required"`
  6. 		fieldThree     float64 `json:"field_three" form:"field_three" validate:"required"`
  7. 	}
  9. 	data := PostCreateData{}
  11. 	if err := c.BodyParser(&data); err != nil {
  12. 		return err
  13. 	}
  15. 	validate := validator.New()
  16. 	if err := validate.Struct(data); err != nil {
  17. 		return err
  18. 	}
  20. 	postCreate := models.PostCreate{
  21. 		fieldOne:         data.fieldOne,
  22. 		fieldTwo:         data.fieldTwo,
  23. 		fieldThree:       float64(data.fieldThree),
  24. 	}
  26. 	database.DB.Create(&postCreate)
  27. 	return c.JSON(postCreate)
  28. }

目前请求无法处理，因为field_three的数据类型错误，它应该是float64，但前端将所有内容都发送为字符串。

我在这里漏掉了哪些步骤？

英文:

I am receiving the following POST request json data from react frontend

  1. {
  2. 	"field_one": "first",
  3. 	"field_two": "second",
  4. 	"field_three": "3.00"
  5. }

but i want golang to convert it to this before processing the request

  1. {
  2. 	"field_one": "first",
  3. 	"field_two": "second",
  4. 	"field_three": 3.00
  5. }

I want to convert the field_three from string to float64, but i am unable to have golang accept the string and process the proper data type

here is my golang function processing the POST request data

  1. func PostCreate(c *fiber.Ctx) error {
  2. 	
  3. 	type PostCreateData struct {
  4. 		fieldOne       string  `json:"field_one" form:"field_one" validate:"required"`
  5. 		fieldTwo       string  `json:"field_two" form:"field_two" validate:"required"`
  6. 		fieldThree     float64 `json:"field_three" form:"field_three" validate:"required"`
  7. 	}
  9. 	data := PostCreateCreateData{}
  11. 	if err := c.BodyParser(&data); err != nil {
  12. 		return err
  13. 	}
  15. 	validate := validator.New()
  16. 		if err := validate.Struct(data); err != nil {
  17. 		return err
  18. 	}
  20. 	postCreate := models.PostCreate{
  21. 		fieldOne:         data.fieldOne,
  22. 		fieldTwo:         data.fieldTwo,
  23. 		fieldThree:       float64(data.fieldThree),
  24. 	}
  26. 	database.DB.Create(&postCreate)
  27. 	return c.JSON(postCreate)
  28. }

Currently the request is not getting processed because the wrong data type for field_three which is supposed to be float64 but frontend is sending everything as string

What steps am i missing here?

答案1

得分: 1

通过更新函数来修复问题：

  1. func PostCreate(c *fiber.Ctx) error {
  2.     
  3.     type PostCreateData struct {
  4.         fieldOne       string  `json:"field_one" form:"field_one" validate:"required"`
  5.         fieldTwo       string  `json:"field_two" form:"field_two" validate:"required"`
  6.         fieldThree     string  `json:"field_three" form:"field_three" validate:"required"`
  7.     }
  9.     data := PostCreateData{}
  11.     if err := c.BodyParser(&data); err != nil {
  12.         return err
  13.     }
  15.     validate := validator.New()
  16.     if err := validate.Struct(data); err != nil {
  17.         return err
  18.     }
  20.     postCreate := models.PostCreate{
  21.         fieldOne:         data.fieldOne,
  22.         fieldTwo:         data.fieldTwo,
  23.         fieldThree:       data.fieldThree,
  24.     }
  26.     database.DB.Create(&postCreate)
  27.     return c.JSON(postCreate)
  28. }

所以将结构体更新为在请求体中接收字符串：

  1. fieldThree     string  `json:"field_three" form:"field_three" validate:"required"`

现在一切都正常工作了！

英文:

fixed by updating the function to this

  1. func PostCreate(c *fiber.Ctx) error {
  2.     
  3.     type PostCreateData struct {
  4.         fieldOne       string  `json:"field_one" form:"field_one" validate:"required"`
  5.         fieldTwo       string  `json:"field_two" form:"field_two" validate:"required"`
  6.         fieldThree     float64 `json:"field_three,string" form:"field_three" validate:"required"`
  7.     }
  9.     data := PostCreateCreateData{}
  11.     if err := c.BodyParser(&data); err != nil {
  12.         return err
  13.     }
  15.     validate := validator.New()
  16.         if err := validate.Struct(data); err != nil {
  17.         return err
  18.     }
  20.     postCreate := models.PostCreate{
  21.         fieldOne:         data.fieldOne,
  22.         fieldTwo:         data.fieldTwo,
  23.         fieldThree:       float64(data.fieldThree),
  24.     }
  26.     database.DB.Create(&postCreate)
  27.     return c.JSON(postCreate)
  28. }

so updated the struct to expect string in the body

  1. fieldThree     float64 `json:"field_three,string" form:"field_three" validate:"required"`

and works like a charm!!!

huangapple
  • 本文由 发表于 2022年1月17日 16:02:58
  • 转载请务必保留本文链接：https://go.coder-hub.com/70738155.html
  • go
  • go-fiber
  • reactjs
  • types
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