Why am I getting an \"interface conversion: interface {} is []interface {}, not map[string]interface {}\" error when converting an interface to a map?

Interface Conversion Error: Invalid Mapping

An error occurs during JSON parsing when attempting to convert an interface to a map, resulting in the message "interface conversion: interface {} is []interface {}, not map[string]interface {}."

Explanation

The error points towards a mismatch between data types. In the provided code snippet, the following line extracts results from the organic results list:

result := fmt.Sprintf("%v", response["organic_results"].(map[string]interface{})["title"])

The assumption is that response["organic_results"] is a map, and its value should be cast as map[string]interface{} to access the specific title value. However, the actual data type of response["organic_results"] is a slice of interfaces ([]interface{}), not a map.

Solution

To resolve the error, the code should be corrected accordingly:

for _, item := range response["organic_results"].([]interface{}) {
    fmt.Sprintf("%v", item.(map[string]interface{})["title"])
}

Here, the loop iterates through each item in the []interface{} slice, and each item is casted as a map[string]interface{} to extract the title value.

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