Retrofit kotlin how to write data class with specific variable name - android-studio

Question

This is part of json file
"list": {
"2023-01-12": [
{
"patient_symptom_id": 10,
"date": "2023-01-12",
"datetime": "2023-01-12T11:11:11.000Z",
"symptom_list": [
{
"symptom_id": 1,
"name": "Color",
"color": "#f4f50b",
"symptom_value_ids": [
3,
4
],
"symptom_value_names": [
"Clear",
"Cloudy"
],
},
{
"symptom_id": 2,
"name": "Energy",
"color": "#7ae38b",
"symptom_value_ids": [
27,
42
],
"symptom_value_names": [
"Anxious",
"High"
],
},
{
"symptom_id": 4,
"name": "Stool",
"color": "#f2b706",
"symptom_value_ids": [
14,
29
],
"symptom_value_names": [
"Constipation (1-2)",
"Unable to Pass"
],
},
{
"symptom_id": 6,
"name": "General Symptoms",
"color": "#951af6",
"symptom_value_ids": [
31,
34
],
"symptom_value_names": [
"Fever",
"Headache"
],
},
{
"symptom_id": 7,
"name": "Urinary Symptoms",
"color": "#23a7f1",
"symptom_value_ids": [
37
],
"symptom_value_names": [
"Urgency when urinating"
],
},
{
"symptom_id": 8,
"name": "Menstrual",
"color": "#f413d6",
"symptom_value_ids": [
45
],
"symptom_value_names": [
"Light flow"
],
}
],
}
],
"2023-01-26": [
{
"patient_symptom_id": 11,
"date": "2023-01-26",
"datetime": "2023-01-26T11:38:11.000Z",
"symptom_list": [
{
"symptom_id": 1,
"name": "Color",
"color": "#f4f50b",
"symptom_value_ids": [
3,
4
],
"symptom_value_names": [
"Clear",
"Cloudy"
],
},
{
"symptom_id": 2,
"name": "Energy",
"color": "#7ae38b",
"symptom_value_ids": [
27,
42
],
"symptom_value_names": [
"Anxious",
"High"
],
},
{
"symptom_id": 4,
"name": "Stool",
"color": "#f2b706",
"symptom_value_ids": [
14,
29
],
"symptom_value_names": [
"Constipation (1-2)",
"Unable to Pass"
],
},
{
"symptom_id": 6,
"name": "General Symptoms",
"color": "#951af6",
"symptom_value_ids": [
31,
34
],
"symptom_value_names": [
"Fever",
"Headache"
],
},
{
"symptom_id": 7,
"name": "Urinary Symptoms",
"color": "#23a7f1",
"symptom_value_ids": [
37
],
"symptom_value_names": [
"Urgency when urinating"
],
},
{
"symptom_id": 8,
"name": "Menstrual",
"color": "#f413d6",
"symptom_value_ids": [
45
],
"symptom_value_names": [
"Light flow"
],
}
],
},
{
"patient_symptom_id": 12,
"date": "2023-01-26",
"datetime": "2023-01-26T11:38:11.000Z",
"symptom_list": [
{
"symptom_id": 1,
"name": "Color",
"color": "#f4f50b",
"symptom_value_ids": [
3,
4
],
"symptom_value_names": [
"Clear",
"Cloudy"
],
},
{
"symptom_id": 2,
"name": "Energy",
"color": "#7ae38b",
"symptom_value_ids": [
27,
42
],
"symptom_value_names": [
"Anxious",
"High"
],
},
{
"symptom_id": 4,
"name": "Stool",
"color": "#f2b706",
"symptom_value_ids": [
14,
29
],
"symptom_value_names": [
"Constipation (1-2)",
"Unable to Pass"
],
},
{
"symptom_id": 6,
"name": "General Symptoms",
"color": "#951af6",
"symptom_value_ids": [
31,
34
],
"symptom_value_names": [
"Fever",
"Headache"
],
},
{
"symptom_id": 7,
"name": "Urinary Symptoms",
"color": "#23a7f1",
"symptom_value_ids": [
37
],
"symptom_value_names": [
"Urgency when urinating"
],
},
{
"symptom_id": 8,
"name": "Menstrual",
"color": "#f413d6",
"symptom_value_ids": [
45
],
"symptom_value_names": [
"Light flow"
],
}
],
},
{
"patient_symptom_id": 13,
"date": "2023-01-26",
"datetime": "2023-01-26T11:38:11.000Z",
"symptom_list": [
{
"symptom_id": 1,
"name": "Color",
"color": "#f4f50b",
"symptom_value_ids": [
3,
4
],
"symptom_value_names": [
"Clear",
"Cloudy"
],
},
{
"symptom_id": 2,
"name": "Energy",
"color": "#7ae38b",
"symptom_value_ids": [
27,
42
],
"symptom_value_names": [
"Anxious",
"High"
],
},
{
"symptom_id": 4,
"name": "Stool",
"color": "#f2b706",
"symptom_value_ids": [
14,
29
],
"symptom_value_names": [
"Constipation (1-2)",
"Unable to Pass"
],
},
{
"symptom_id": 6,
"name": "General Symptoms",
"color": "#951af6",
"symptom_value_ids": [
31,
34
],
"symptom_value_names": [
"Fever",
"Headache"
],
},
{
"symptom_id": 7,
"name": "Urinary Symptoms",
"color": "#23a7f1",
"symptom_value_ids": [
37
],
"symptom_value_names": [
"Urgency when urinating"
],
},
{
"symptom_id": 8,
"name": "Menstrual",
"color": "#f413d6",
"symptom_value_ids": [
45
],
"symptom_value_names": [
"Light flow"
],
}
],
},
{
"patient_symptom_id": 80,
"date": "2023-01-26",
"datetime": "2023-01-26T11:11:11.000Z",
"symptom_list": [
{
"symptom_id": 1,
"name": "Color",
"color": "#f4f50b",
"symptom_value_ids": [
6
],
"symptom_value_names": [
"Low"
],
},
{
"symptom_id": 2,
"name": "Energy",
"color": "#7ae38b",
"symptom_value_ids": [
27,
42
],
"symptom_value_names": [
"Anxious",
"High"
],
},
{
"symptom_id": 4,
"name": "Stool",
"color": "#f2b706",
"symptom_value_ids": [
14,
29
],
"symptom_value_names": [
"Constipation (1-2)",
"Unable to Pass"
],
},
{
"symptom_id": 6,
"name": "General Symptoms",
"color": "#951af6",
"symptom_value_ids": [
31,
34
],
"symptom_value_names": [
"Fever",
"Headache"
],
},
{
"symptom_id": 7,
"name": "Urinary Symptoms",
"color": "#23a7f1",
"symptom_value_ids": [
37
],
"symptom_value_names": [
"Urgency when urinating"
],
},
{
"symptom_id": 8,
"name": "Menstrual",
"color": "#f413d6",
"symptom_value_ids": [
45
],
"symptom_value_names": [
"Light flow"
],
}
],
}
],
"2023-01-29": [
{
"patient_symptom_id": 16,
"date": "2023-01-29",
"datetime": "2023-01-29T11:38:11.000Z",
"symptom_list": [
{
"symptom_id": 1,
"name": "Color",
"color": "#f4f50b",
"symptom_value_ids": [
3,
4
],
"symptom_value_names": [
"Clear",
"Cloudy"
],
},
{
"symptom_id": 2,
"name": "Energy",
"color": "#7ae38b",
"symptom_value_ids": [
27,
42
],
"symptom_value_names": [
"Anxious",
"High"
],
},
{
"symptom_id": 4,
"name": "Stool",
"color": "#f2b706",
"symptom_value_ids": [
14,
29
],
"symptom_value_names": [
"Constipation (1-2)",
"Unable to Pass"
],
},
{
"symptom_id": 6,
"name": "General Symptoms",
"color": "#951af6",
"symptom_value_ids": [
31,
34
],
"symptom_value_names": [
"Fever",
"Headache"
],
},
{
"symptom_id": 7,
"name": "Urinary Symptoms",
"color": "#23a7f1",
"symptom_value_ids": [
37
],
"symptom_value_names": [
"Urgency when urinating"
],
},
{
"symptom_id": 8,
"name": "Menstrual",
"color": "#f413d6",
"symptom_value_ids": [
45
],
"symptom_value_names": [
"Light flow"
],
}
],
},
{
"patient_symptom_id": 17,
"date": "2023-01-29",
"datetime": "2023-01-29T11:38:11.000Z",
"symptom_list": [
{
"symptom_id": 1,
"name": "Color",
"color": "#f4f50b",
"symptom_value_ids": [
1,
6
],
"symptom_value_names": [
"Low",
"Yellow"
],
},
{
"symptom_id": 2,
"name": "Energy",
"color": "#7ae38b",
"symptom_value_ids": [
27,
42
],
"symptom_value_names": [
"Anxious",
"High"
],
},
{
"symptom_id": 4,
"name": "Stool",
"color": "#f2b706",
"symptom_value_ids": [
14,
29
],
"symptom_value_names": [
"Constipation (1-2)",
"Unable to Pass"
],
},
{
"symptom_id": 6,
"name": "General Symptoms",
"color": "#951af6",
"symptom_value_ids": [
31,
34
],
"symptom_value_names": [
"Fever",
"Headache"
],
},
{
"symptom_id": 7,
"name": "Urinary Symptoms",
"color": "#23a7f1",
"symptom_value_ids": [
37
],
"symptom_value_names": [
"Urgency when urinating"
],
},
{
"symptom_id": 8,
"name": "Menstrual",
"color": "#f413d6",
"symptom_value_ids": [
45
],
"symptom_value_names": [
"Light flow"
],
}
],
},
{
"patient_symptom_id": 19,
"date": "2023-01-29",
"datetime": "2023-01-29T11:38:11.000Z",
"symptom_list": [
{
"symptom_id": 1,
"name": "Color",
"color": "#f4f50b",
"symptom_value_ids": [
1,
6
],
"symptom_value_names": [
"Low",
"Yellow"
],
},
{
"symptom_id": 2,
"name": "Energy",
"color": "#7ae38b",
"symptom_value_ids": [
27,
42
],
"symptom_value_names": [
"Anxious",
"High"
],
},
{
"symptom_id": 4,
"name": "Stool",
"color": "#f2b706",
"symptom_value_ids": [
14,
29
],
"symptom_value_names": [
"Constipation (1-2)",
"Unable to Pass"
],
},
{
"symptom_id": 6,
"name": "General Symptoms",
"color": "#951af6",
"symptom_value_ids": [
31,
34
],
"symptom_value_names": [
"Fever",
"Headache"
],
},
{
"symptom_id": 7,
"name": "Urinary Symptoms",
"color": "#23a7f1",
"symptom_value_ids": [
37
],
"symptom_value_names": [
"Urgency when urinating"
],
},
{
"symptom_id": 8,
"name": "Menstrual",
"color": "#f413d6",
"symptom_value_ids": [
45
],
"symptom_value_names": [
"Light flow"
],
}
],
},
{
"patient_symptom_id": 20,
"date": "2023-01-29",
"datetime": "2023-01-29T11:38:11.000Z",
"symptom_list": [
{
"symptom_id": 1,
"name": "Color",
"color": "#f4f50b",
"symptom_value_ids": [
1,
6
],
"symptom_value_names": [
"Low",
"Yellow"
],
},
{
"symptom_id": 2,
"name": "Energy",
"color": "#7ae38b",
"symptom_value_ids": [
27,
42
],
"symptom_value_names": [
"Anxious",
"High"
],
},
{
"symptom_id": 4,
"name": "Stool",
"color": "#f2b706",
"symptom_value_ids": [
14,
29
],
"symptom_value_names": [
"Constipation (1-2)",
"Unable to Pass"
],
},
{
"symptom_id": 6,
"name": "General Symptoms",
"color": "#951af6",
"symptom_value_ids": [
31,
34
],
"symptom_value_names": [
"Fever",
"Headache"
],
},
{
"symptom_id": 7,
"name": "Urinary Symptoms",
"color": "#23a7f1",
"symptom_value_ids": [
37
],
"symptom_value_names": [
"Urgency when urinating"
],
},
{
"symptom_id": 8,
"name": "Menstrual",
"color": "#f413d6",
"symptom_value_ids": [
45
],
"symptom_value_names": [
"Light flow"
],
}
],
}
Inside the list, everything seems like a dictionary whose key is the date value is a List. When I write data class, I write in this way now:
data class Lists(
val `2023-01-02`: List<SymptomList>,
val `2023-01-03`: List<SymptomList>,
val `2023-01-04`: List<SymptomList>,
val `2023-01-07`: List<SymptomList>,
val `2023-01-10`: List<SymptomList>,
val `2023-01-11`: List<SymptomList>,
val `2023-01-12`: List<SymptomList>,
val `2023-01-13`: List<SymptomList>,
val `2023-01-20`: List<SymptomList>,
val `2023-01-22`: List<SymptomList>,
val `2023-01-24`: List<SymptomList>,
val `2023-01-25`: List<SymptomList>,
val `2023-01-26`: List<SymptomList>,
val `2023-01-27`: List<SymptomList>,
val `2023-01-28`: List<SymptomList>,
val `2023-01-29`: List<SymptomList>,
val `2023-01-30`: List<SymptomList>,
val `2023-01-31`: List<SymptomList>
)
I know it is not the good way, because there may be more item in dictionary, so what should I do to write the data class? I tried add one more layer named dictionary but it didn't work.
data class Dictionary(
val dictionary: MutableMap<DateKey, List<SymptomList>>
)

Answer 1

Firstly, please use online resource like JSON Formatter & Validator to validate and beautify your JSON String. It is not readable and also invalid.
Back to your question, yes, you should use MutableMap to store your list of Objects instead of creating tons of variables in your data class.
Consider the following example that should have similar structure with your JSON String:
{
"data":{
"2022-12-20":[
{
"id":1,
"name":"A"
},
{
"id":2,
"name":"B"
}
],
"2022-12-21":[
{
"id":3,
"name":"C"
},
{
"id":4,
"name":"D"
}
]
}
}
You should have the following data classes:
data class DataList(val data: MutableMap<String, List<SubData>>)
data class SubData(val id: Int, val name: String)
And you can use Gson library to convert your JSON String into your Object:
val dataList = Gson().fromJson(rawJson, DataList::class.java)
dataList.data.forEach { (key, value) ->
println("Key: $key")
println("Value: $value")
}
Output:
Key: 2022-12-20
Value: [SubData(id=1, name=A), SubData(id=2, name=B)]
Key: 2022-12-21
Value: [SubData(id=3, name=C), SubData(id=4, name=D)]