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Home  >  Article  >  Backend Development  >  How to Handle the \"invalid operation: d[\\\"data\\\"] (type interface {} does not support indexing)\" Error in Golang When Accessing Nested JSON Data?

How to Handle the \"invalid operation: d[\\\"data\\\"] (type interface {} does not support indexing)\" Error in Golang When Accessing Nested JSON Data?

Susan Sarandon
Susan SarandonOriginal
2024-10-26 09:40:02651browse

How to Handle the

Addressing the Error: "invalid operation: d["data"] (type interface {} does not support indexing)"

encountered while accessing nested JSON data in Golang.

When working with dynamic JSON responses, it is not uncommon to encounter the error, "invalid operation: (type interface {} does not support indexing)". This occurs when you attempt to index an interface, as in d["data"], which requires a specific type assertion to the appropriate key-value store, such as map[string]interface{}.

To resolve this, you need to first ensure that the variable d is type-asserted as a map[string]interface{}, as seen below:

<code class="go">test := d.(map[string]interface{})["data"].(map[string]interface{})["type"]</code>

By making this assertion, you are specifically stating that d is of type map[string]interface{}, allowing you to access its keys. Subsequently, you can access the "data" and retrieve the "type" property from the nested map.

As an alternative approach, you can also declare d as a map[string]interface{} directly:

<code class="go">var d map[string]interface{}
json.NewDecoder(response.Body).Decode(&d)
test := d["data"].(map[string]interface{})["type"]</code>

By doing so, you eliminate the need for the first type assertion.

To aid in these operations, consider using the github.com/icza/dyno library, which specializes in handling dynamic objects and provides convenient methods for navigating and manipulating JSON data.

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golang json String Object for while Error using Interface Property map this github Access
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