解决"json: cannot unmarshal array into Go value of type model.IndexDoc"错误

This error occurs when trying to unmarshal an array into a Go value of type `model.IndexDoc`. It means that the JSON data you are trying to unmarshal is an array, but you are trying to unmarshal it into a single value of type `model.IndexDoc`. \n\nTo fix this error, you need to make sure that your JSON data matches the expected Go type. If the JSON data is an array, you should unmarshal it into a slice or an array instead of a single value.\n\nFor example, if your JSON data looks like this:\n\njson\n[\n {\"id\": 1, \"name\": \"John\"},\n {\"id\": 2, \"name\": \"Jane\"}\n]\n\n\nYou should unmarshal it into a slice of `model.IndexDoc` like this:\n\ngo\nvar docs []model.IndexDoc\nerr := json.Unmarshal(jsonData, &docs)\nif err != nil {\n // handle error\n}\n\n\nIf you are expecting a single object instead of an array, you need to modify your JSON data accordingly or change the Go type to match the array structure.