英文:
How to return a struct as a one-element JSON array in Gin?
问题
我有一个根据产品ID返回产品的函数，但问题是它不以数据数组的形式返回。
func GetProductsById(c *gin.Context) {var Product models.Productsif err := config.DB.Where("id=?", c.Query("prod_id")).First(&Product).Error; err != nil {c.JSON(http.StatusInternalServerError, err.Error())} else {c.JSON(http.StatusOK, gin.H{"data": &Product})}}
JSON响应如下：
{"data": {"ID": 1,..."Feedback": null}}
我想要的结果是：
{"data": [{"ID": 1,..."Feedback": null}]}
英文:
I have a function that returns a product by its ID, but the problem is that it does not return it as a data array
func GetProductsById(c *gin.Context) {var Product models.Productsif err := config.DB.Where("id=?", c.Query("prod_id")).First(&Product).Error; err != nil {c.JSON(http.StatusInternalServerError, err.Error())} else {c.JSON(http.StatusOK, gin.H{"data": &Product})}}
json response
{"data": {"ID": 1,..."Feedback": null}}
I want this:
{"data": [{"ID": 1,..."Feedback": null}]}</details># 答案1**得分**: 2根据@mkopriva的建议，要将结构体作为单元素的JSON数组返回，可以将其包装在切片字面量中。```govar p models.Product// ...c.JSON(http.StatusOK, gin.H{"data": []models.Product{p}})
如果你不想为切片项指定特定的类型，可以使用[]interface{}或从Go 1.18开始使用[]any。
c.JSON(http.StatusOK, gin.H{"data": []interface{}{p}})// c.JSON(http.StatusOK, gin.H{"data": []any{p}})
英文:
As suggested by @mkopriva, to easily return a struct as a single-element JSON array, wrap it in a slice literal.
var p models.Product// ...c.JSON(http.StatusOK, gin.H{"data": []models.Product{p}})
If you don't want to specify a particular type for the slice items, you can use []interface{}, or []any starting from Go 1.18
c.JSON(http.StatusOK, gin.H{"data": []interface{}{p}})// c.JSON(http.StatusOK, gin.H{"data": []any{p}})
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