RESTful and HTTP APIs in Pyramid Transcripts
Chapter: Conclusion
Lecture: Lightning review: API view methods
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0:01
Now we've got our app all configured, it's time to add some api views to it.
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So here we are going to create a method
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that's going to respond to the route api_all cars, that's probably /api/autos,
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it's going to return its response as json
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and it's only going to respond to get methods.
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So what do we do— well, we just go to the repository
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and say give me the 25 latest cars and boom— here they are,
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and this worked because at this current early stage
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the repository returned a list of dictionaries, not something more advanced
0:29
like sqlalchemy objects, so we go and get the car from the database
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return the list, and because the renderer is set to json,
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it automatically formats that to a list of json objects,
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if it knows how to serialize them, which it does in this case.
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Now, if we want something more advanced
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not just reading the cars but creating one, we could go to the same route
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but now we have post instead of get,
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and in this case we're going to say request.json_body
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to convert the text that was submitted to us into a Python dictionary
0:57
by parsing it as json, that might have failed,
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so we'll send them a response 400, bad request, if that's the case;
1:03
otherwise, we'll actually try to create the car
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and we'll get back the car from the database
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because we want the default values that got created in the database to be sent back
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so we'll say the response is 201 created,
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oh yeah and here's the body of the car, if it happens to be an error—
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well, that's probably on us, 500, sorry about that.
