Golang错误 – 组合字面量中缺少类型

huangapple
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英文:

Golang error - missing type in composite literal

问题

我是你的中文翻译助手，以下是你要翻译的内容：

我是Golang的新手，尝试构建一个批量上传脚本到Elasticsearch的脚本。我写了一段示例代码来完成这个任务，但是遇到了一个简单的错误"missing type in composite literal"。

我在谷歌上搜索了一下，找到了一些参考帖子，但是我真的无法弄清楚我缺少了什么。

我的main.go文件如下：

  1. package main
  3. import (
  4. 	"fmt"
  5. 	"golang.org/x/net/context"
  6. 	"gopkg.in/olivere/elastic.v5"
  7. 	"strconv"
  8. )
  10. type Product struct {
  11. 	ProductDisplayname string `json:"product_displayname"`
  12. 	ProductPrice       string `json:"product_price"`
  13. 	Popularity         string `json:"popularity"`
  14. 	Barcode            string `json:"barcode"`
  15. 	ExclusiveFlag      string `json:"exclusive_flag"`
  16. 	ProductID          string `json:"product_id"`
  17. 	ProductName        string `json:"product_name"`
  18. 	BrandName          string `json:"brand_name"`
  19. 	BrandID            string `json:"brand_id"`
  20. 	ProductSpec        struct {
  21. 		DisplaySpec []struct {
  22. 			SpecID string `json:"spec_id"`
  23. 			Sdv    string `json:"sdv"`
  24. 			Snv    string `json:"snv"`
  25. 		} `json:"display_spec"`
  26. 		FilterSpec []struct {
  27. 			SpecID string `json:"spec_id"`
  28. 			Sdv    string `json:"sdv"`
  29. 			Snv    string `json:"snv"`
  30. 		} `json:"filter_spec"`
  31. 	} `json:"product_spec"`
  32. }
  34. func main() {
  35. 	// 创建一个上下文
  36. 	ctx := context.Background()
  38. 	client, err := elastic.NewClient()
  39. 	if err != nil {
  40. 		fmt.Println("%v", err)
  41. 	}
  43. 	// 批量上传代码
  44. 	n := 0
  45. 	for i := 0; i < 1000; i++ {
  46. 		bulkRequest := client.Bulk()
  47. 		for j := 0; j < 10000; j++ {
  48. 			n++
  49. 			productData := Product{ProductDisplayname: "LG Stylus 2 Plus K535D (16 GB, Brown)", ProductPrice: "24000.00", Popularity: "0.00", Barcode: "", ExclusiveFlag: "0", ProductID: "17698276", ProductName: "Stylus 2 Plus K535D (Brown)", BrandName: "LG", BrandID: "1", ProductSpec: struct {
  50. 				DisplaySpec []struct {
  51. 					SpecID string `json:"spec_id"`
  52. 					Sdv    string `json:"sdv"`
  53. 					Snv    string `json:"snv"`
  54. 				} `json:"display_spec"`
  55. 				FilterSpec []struct {
  56. 					SpecID string `json:"spec_id"`
  57. 					Sdv    string `json:"sdv"`
  58. 					Snv    string `json:"snv"`
  59. 				} `json:"filter_spec"`
  60. 			}{DisplaySpec: []struct {
  61. 				SpecID string `json:"spec_id"`
  62. 				Sdv    string `json:"sdv"`
  63. 				Snv    string `json:"snv"`
  64. 			}{{SpecID: "103", Sdv: "24000", Snv: "24000.0000"}, {SpecID: "104", Sdv: "GSM", Snv: "0.0000"}}, FilterSpec: []struct {
  65. 				SpecID string `json:"spec_id"`
  66. 				Sdv    string `json:"sdv"`
  67. 				Snv    string `json:"snv"`
  68. 			}{{SpecID: "103", Sdv: "24000", Snv: "24000.0000"}, {SpecID: "105", Sdv: "Touch Screen", Snv: "0.0000"}}}}
  69. 			req := elastic.NewBulkIndexRequest().Index("shopfront").Type("products").Id(strconv.Itoa(n)).Doc(productData)
  70. 			bulkRequest = bulkRequest.Add(req)
  71. 		}
  73. 		bulkResponse, err := bulkRequest.Do(ctx)
  74. 		if err != nil {
  75. 			fmt.Println(err)
  76. 		}
  77. 		if bulkResponse != nil {
  78. 			fmt.Println(bulkResponse)
  79. 		}
  80. 		fmt.Println(i)
  81. 	}
  82. }
  84. 需要帮助。
  86. <details>
  87. <summary>英文:</summary>
  89. I&#39;m new to Golang &amp; trying to build bulk upload script to Elasticsearch. Wrote one sample code to do the thing but getting one simple error ```&quot;missing type in composite literal&quot;```. 
  91. I google about this. Got some reference post but I really can&#39;t able to fig. out what I&#39;m missing.
  93. **My main.go file** -
  95. 	package main
  97. 	import (
  98. 		&quot;fmt&quot;
  99. 		&quot;golang.org/x/net/context&quot;
  100. 		&quot;gopkg.in/olivere/elastic.v5&quot;
  101. 		&quot;strconv&quot;
  102. 	)
  104. 	type Product struct {
  105. 		ProductDisplayname string `json:&quot;product_displayname&quot;`
  106. 		ProductPrice       string `json:&quot;product_price&quot;`
  107. 		Popularity         string `json:&quot;popularity&quot;`
  108. 		Barcode            string `json:&quot;barcode&quot;`
  109. 		ExclusiveFlag      string `json:&quot;exclusive_flag&quot;`
  110. 		ProductID          string `json:&quot;product_id&quot;`
  111. 		ProductName        string `json:&quot;product_name&quot;`
  112. 		BrandName          string `json:&quot;brand_name&quot;`
  113. 		BrandID            string `json:&quot;brand_id&quot;`
  114. 		ProductSpec        struct {
  115. 			DisplaySpec []struct {
  116. 				SpecID string `json:&quot;spec_id&quot;`
  117. 				Sdv    string `json:&quot;sdv&quot;`
  118. 				Snv    string `json:&quot;snv&quot;`
  119. 			} `json:&quot;display_spec&quot;`
  120. 			FilterSpec []struct {
  121. 				SpecID string `json:&quot;spec_id&quot;`
  122. 				Sdv    string `json:&quot;sdv&quot;`
  123. 				Snv    string `json:&quot;snv&quot;`
  124. 			} `json:&quot;filter_spec&quot;`
  125. 		} `json:&quot;product_spec&quot;`
  126. 	}
  128. 	func main() {
  129. 		// Create a context
  130. 		ctx := context.Background()
  132. 		client, err := elastic.NewClient()
  133. 		if err != nil {
  134. 			fmt.Println(&quot;%v&quot;, err)
  135. 		}
  137. 		// Bulk upload code
  138. 		n := 0
  139. 		for i := 0; i &lt; 1000; i++ {
  140. 			bulkRequest := client.Bulk()
  141. 			for j := 0; j &lt; 10000; j++ {
  142. 				n++
  143. 				productData := Product{ProductDisplayname: &quot;LG Stylus 2 Plus K535D (16 GB, Brown)&quot;, ProductPrice: &quot;24000.00&quot;, Popularity: &quot;0.00&quot;, Barcode: &quot;&quot;, ExclusiveFlag: &quot;0&quot;, ProductID: &quot;17698276&quot;, ProductName: &quot;Stylus 2 Plus K535D (Brown)&quot;, BrandName: &quot;LG&quot;, BrandID: &quot;1&quot;, ProductSpec: {DisplaySpec: {SpecID: &quot;103&quot;, Sdv: &quot;24000&quot;, Snv: &quot;24000.0000&quot;}, {SpecID: &quot;104&quot;, Sdv: &quot;GSM&quot;, Snv: &quot;0.0000&quot;}, FilterSpec: {SpecID: &quot;103&quot;, Sdv: &quot;24000&quot;, Snv: &quot;24000.0000&quot;}, {SpecID: &quot;105&quot;, Sdv: &quot;Touch Screen&quot;, Snv: &quot;0.0000&quot;}}}
  144. 				req := elastic.NewBulkIndexRequest().Index(&quot;shopfront&quot;).Type(&quot;products&quot;).Id(strconv.Itoa(n)).Doc(productData)
  145. 				bulkRequest = bulkRequest.Add(req)
  146. 			}
  148. 			bulkResponse, err := bulkRequest.Do(ctx)
  149. 			if err != nil {
  150. 				fmt.Println(err)
  151. 			}
  152. 			if bulkResponse != nil {
  153. 				fmt.Println(bulkResponse)
  154. 			}
  155. 			fmt.Println(i)
  156. 		}
  157. 	}
  160. Need some help.
  162. </details>
  165. # 答案1
  166. **得分**: 5
  168. 你应该为`ProductSpec`/`DisplaySpec`/`FilterSpec`使用`named type`。
  170. 试试这样写：
  172. ```go
  173. type DisplaySpecType struct {
  174.     SpecID string `json:"spec_id"`
  175.     Sdv    string `json:"sdv"`
  176.     Snv    string `json:"snv"`
  177. }
  179. type FilterSpecType struct {
  180.     SpecID string `json:"spec_id"`
  181.     Sdv    string `json:"sdv"`
  182.     Snv    string `json:"snv"`
  183. }
  185. type ProductSpecType struct {
  186.     DisplaySpec []DisplaySpecType `json:"display_spec"`
  187.     FilterSpec  []FilterSpecType  `json:"filter_spec"`
  188. }
  190. type Product struct {
  191.     ProductDisplayname string          `json:"product_displayname"`
  192.     ProductPrice       string          `json:"product_price"`
  193.     Popularity         string          `json:"popularity"`
  194.     Barcode            string          `json:"barcode"`
  195.     ExclusiveFlag      string          `json:"exclusive_flag"`
  196.     ProductID          string          `json:"product_id"`
  197.     ProductName        string          `json:"product_name"`
  198.     BrandName          string          `json:"brand_name"`
  199.     BrandID            string          `json:"brand_id"`
  200.     ProductSpec        ProductSpecType `json:"product_spec"`
  201. }
  203. var productData = Product{
  204.     ProductDisplayname: "LG Stylus 2 Plus K535D (16 GB, Brown)",
  205.     ProductPrice:       "24000.00",
  206.     Popularity:         "0.00",
  207.     Barcode:            "",
  208.     ExclusiveFlag:      "0",
  209.     ProductID:          "17698276",
  210.     ProductName:        "Stylus 2 Plus K535D (Brown)",
  211.     BrandName:          "LG",
  212.     BrandID:            "1",
  213.     ProductSpec: ProductSpecType{
  214.         DisplaySpec: []DisplaySpecType{
  215.             DisplaySpecType{
  216.                 SpecID: "103",
  217.                 Sdv:    "24000",
  218.                 Snv:    "24000.0000",
  219.             },
  220.             DisplaySpecType{
  221.                 SpecID: "104",
  222.                 Sdv:    "GSM",
  223.                 Snv:    "0.0000",
  224.             },
  225.         },
  226.         FilterSpec: []FilterSpecType{
  227.             FilterSpecType{
  228.                 SpecID: "103",
  229.                 Sdv:    "24000",
  230.                 Snv:    "24000.0000",
  231.             },
  232.             FilterSpecType{
  233.                 SpecID: "105",
  234.                 Sdv:    "Touch Screen",
  235.                 Snv:    "0.0000",
  236.             },
  237.         },
  238.     },
  239. }

在这里查看named/unamed type的详细信息。

英文:

you should use named type for ProductSpec/DisplaySpec/FilterSpec.

try this:

  1.  type DisplaySpecType struct {
  2. SpecID string `json:&quot;spec_id&quot;`
  3. Sdv    string `json:&quot;sdv&quot;`
  4. Snv    string `json:&quot;snv&quot;`
  5. }
  6. type FilterSpecType struct {
  7. SpecID string `json:&quot;spec_id&quot;`
  8. Sdv    string `json:&quot;sdv&quot;`
  9. Snv    string `json:&quot;snv&quot;`
  10. }
  11. type ProductSpecType struct {
  12. DisplaySpec []DisplaySpecType `json:&quot;display_spec&quot;`
  13. FilterSpec  []FilterSpecType  `json:&quot;filter_spec&quot;`
  14. }
  15. type Product struct {
  16. ProductDisplayname string          `json:&quot;product_displayname&quot;`
  17. ProductPrice       string          `json:&quot;product_price&quot;`
  18. Popularity         string          `json:&quot;popularity&quot;`
  19. Barcode            string          `json:&quot;barcode&quot;`
  20. ExclusiveFlag      string          `json:&quot;exclusive_flag&quot;`
  21. ProductID          string          `json:&quot;product_id&quot;`
  22. ProductName        string          `json:&quot;product_name&quot;`
  23. BrandName          string          `json:&quot;brand_name&quot;`
  24. BrandID            string          `json:&quot;brand_id&quot;`
  25. ProductSpec        ProductSpecType `json:&quot;product_spec&quot;`
  26. }
  27. var productData = Product{ProductDisplayname: &quot;LG Stylus 2 Plus K535D (16 GB, Brown)&quot;, ProductPrice: &quot;24000.00&quot;, Popularity: &quot;0.00&quot;, Barcode: &quot;&quot;, ExclusiveFlag: &quot;0&quot;, ProductID: &quot;17698276&quot;, ProductName: &quot;Stylus 2 Plus K535D (Brown)&quot;, BrandName: &quot;LG&quot;, BrandID: &quot;1&quot;, ProductSpec: ProductSpecType{DisplaySpec: []DisplaySpecType{DisplaySpecType{SpecID: &quot;103&quot;, Sdv: &quot;24000&quot;, Snv: &quot;24000.0000&quot;}, DisplaySpecType{SpecID: &quot;104&quot;, Sdv: &quot;GSM&quot;, Snv: &quot;0.0000&quot;}}, FilterSpec: []FilterSpecType{FilterSpecType{SpecID: &quot;103&quot;, Sdv: &quot;24000&quot;, Snv: &quot;24000.0000&quot;}, FilterSpecType{SpecID: &quot;105&quot;, Sdv: &quot;Touch Screen&quot;, Snv: &quot;0.0000&quot;}}}}

see here for named/unamed type.

huangapple
  • 本文由 发表于 2017年3月15日 14:01:51
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