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ViewsFASTAPI: Getting Error 422 : Unprocessable Entity when trying to pass a json object inside body
I haven't seen an answer for my question yet, so here it is.
I'm trying to pass a json object like : inside a body of a post request in fastapi so that i'll store it inside a database later or process it in any way
{
"action_reaction": {
"action": {
"name": "test"
},
"reaction": {
"name2": "test2"
}
}
}
Here's my code :
class AddActionModel(BaseModel):
action_reaction: str = None
@router.post("/add_reaction")
async def add_action_reaction(addActionModel: AddActionModel, x_token: str = Header(None)):
print(f'addActionModel: {addActionModel}')
action_reactions = json.loads(addActionModel.action_reaction)
action = action_reactions["action"]
reaction = action_reactions["reaction"]
return {"success": True}
The problem is I always get this response:
Does anyone has an idea on how to do it ?
Thanks
·
Santiago Trujillo
1 answers
Answer question0
The JSON you're sending is invalid.
Your code is expecting a JSON object containing a string-value, which you're decoding on the server-side.
To make your request work, you want to escape the quotes inside of the action_reaction, like this:
{
"action_reaction": "{\"action\": {\"name\": \"test\"}, \"reaction\": {\"name2\": \"test2\"}}"
}
Alternative: implement a nested model for all the objects:
class Event(BaseModel):
name: str
class ActionReaction(BaseModel):
action: Event
reaction: Event
class AddActionModel(BaseModel):
action_reaction: ActionReaction = None
If you define it like this, then no need to json.loads on the backend side, as the whole object will be parsed by FastAPI + Pydantic.
·
Santiago Trujillo
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