显示 JSON 数组数据时出错 - 无法将复杂对象类型转换为简单值

Question

我目前有一个 MoocJson.json 文件，如下所示：

[
 {"body":"some text goes here", 
  "link":"a link is here",
  "name":"name of product goes here",
  "language":"language goes here",
  "tags":["tag1","tag2","tag3","tag4"],
  "initiative":"initiative content goes here",
  "start_date":"start date goes here",
  "categories":["cat1","cat2","cat3"]
 },
{"body":"2 some text goes here", 
 "link":"2 a link is here",
 "name":"2 name of product goes here",
 "language":"2 language goes here",
 "tags":["2 tag1","2 tag2","2 tag3","2 tag4"],
 "initiative":"2 initiative content goes here",
 "start_date":"2 start date goes here",
 "categories":["2 cat1","2 cat2","2 cat3"]
 },
{"body":"3 some text goes here", 
 "link":"3 a link is here",
 "name":"3 name of product goes here",
 "language":"3 language goes here",
 "tags":["3 tag1","3 tag2"],
 "initiative":"2 initiative content goes here",
 "start_date":"2 start date goes here",
 "categories":["3 cat1"]
 }
]
// End of JSON file

我的CF代码如下：

<cffile action="read" file="#ExpandPath("./MoocJson.json")#" variable="myxml">
<cfset mydoc = deserializedJSON(myxml)>
<cfdump var="#mydoc#">   <!--- this dumps out the JSON in Array format --->

<cfoutput> My Doc Length = #arraylen(mydoc)#</cfoutput>

<!--- Loop through Array of mydoc and out put content --->
<cfoutput>
<cfloop from="1" to="#arrayLen(mydoc)#" index="i">
<cfset Course = mydoc[i]>

#Course.Name# <br>
#Course.body# <br>
#Course.language# <br>
#Course.link# <br>
#Course.initiative# <br>
#Course.start_date# <br>
#Course.tags# <br>
#Course.categories# <br>

</cfloop>
</cfoutput>
<!--- End of Code --->

当我运行它时，除了 TAGS 和 CATEGORIES 之外的所有内容都会显示。对于这两个，我得到

的错误

Complex object types cannot be converted to simple values

如何读取主数组中的 TAGS 和 CATEGORIES 数组？

Answer 1

TAGS 和 CATEGORIES 是数组。您可以使用 ArrayToList 函数将它们转换为字符串。

试试这个：

#ArrayToList(Course.tags)# <br>
#ArrayToList(Course.categories)# <br>

显示 JSON 数组数据时出错 - 无法将复杂对象类型转换为简单值

Error displaying JSON Array Data - Complex object types cannot be converted to simple values

coldfusion

json

multidimensional-array

coldfusion-11