Sorry about all this, Pascal. Didn't mean to make you write your session
early. :-) I guess I'm just dense about this stuff, never having used Rest
before, ERRest in particular, or, for that matter, ever had to deal directly
with HTTP response codes. This seems to suggest that you can't, from within a
controller for a given entity (in this case "Device"), create a method with,
based on a passed in String, fetch an object of a different entity
("DeviceNoteType") which points to (via a to-one) a NoteType object with the
name passed in as a variable?
Basically I want to do this:
- create a single action method (in my DeviceController) which allows the
client to pass in a String variable "noteTypeName", then
- uses that String to fetch a DeviceNoteType object where the noteType has that
noteTypeName, and the device is the current device
--> If there is, set the status to active,
--> if not, create a new DeviceNoteType
The issue I am having is that the passed in string ("noteTypeName") is not a
key on Device, but is rather used for fetching a different object of a
different entity. I am always getting null from the routeObjectForKey method.
I would really rather not have the client make two requests, and have to figure
out http return calls. I'd rather have them be able to simply call the
addNoteType action and pass in a typeName (and eventually, be able to do this
with an array of typeNames)
__________________________________________
I am willing to make the client call several action methods via curl if needed.
In any event, I don't seem to know how to actually call the route you mentioned
in your post. In my Application class I added the route:
routeRequestHandler.addRoute(new ERXRoute(NoteType.ENTITY_NAME,
"/NoteType/{name:String}", ERXRoute.Method.Get, NoteTypeController.class,
"fetchByName"));
Thing is, I have no idea at all how to call this from the command line to see
if it returns anything. (and I have no idea how the http response codes would
appear)
I tried:
curl -X GET
http://MacBook-Pro.local:9001/cgi-bin/WebObjects/ra/NoteType/[name='alert'].json
(curl: (3) [globbing] error: bad range specification after pos 80)
curl -X GET
http://MacBook-Pro.local:9001/cgi-bin/WebObjects/ra/NoteType/'alert'.json
(- Unable to get contents of file
'/Library/WebServer/Documents/cgi-bin/WebObjects/ra/NoteType/alert.json' for
uri: /cgi-bin/WebObjects/ra/NoteType/alert.json)
curl -X GET http://MacBook-Pro.local:9001/cgi-bin/WebObjects/ra/NoteType/'alert'
(no alertAction method)
And various other things. I've tried to find rest tutorials to indicate what
the syntax is supposed to be, but everything seems to be assuming you're
passing in an id, which, obviously, I don't have.
Assuming I eventually get this basic bit of syntax down, it looks like the
client would need to call the create on the DeviceNoteType and pass in fully
formed json representations of the NoteType and the Device? Presumably they
would do this by getting the json from the response?
Sorry for not getting this stuff.
Andrew
On Mar 29, 2011, at 4:21 PM, Pascal Robert wrote:
>
> Le 2011-03-29 à 16:03, Andrew Kinnie a écrit :
>
>> Thanks for the tip on using create that way. I didn't know you could do
>> that. In any event, that's the problem. NoteType is basically a lookup
>> table. I would want to fetch an existing noteType based on some unique
>> attribute, such as "typeName" (which ensure is unique in the EO class) I
>> don't want to create a new noteType, I want to create the intervening object
>> (DeviceNoteType) which has a to-one to NoteType and a to-one to Device. AND
>> (here's the tough part - for me at least) I want to only create a new one if
>> one doesn't already exist. So I need to fetch first, and I want to fetch
>> based on the value passed in for the name key
>
> So you will do:
>
> new ERXRoute(NoteType.ENTITY_NAME, "/NoteType/{name:String}",
> ERXRoute.Method.Get, NoteTypesController.class, "fetchByName");
>
> public WOActionResults fetchByNameAction() {
> String typeName = routeObjectForKey("name");
> NoteType type = NoteType.fetchNoteType(editingContext(),
> User.NAME.eq(typeName));
> return response(type, yourerxkeyfilter());
> }
>
> If fetchByNameAction didn't find an object, ERRest will return the HTTP code
> 404, so your client can know that the object was not found, and call:
>
> new ERXRoute(NoteType.ENTITY_NAME, "/NoteType/", ERXRoute.Method.Post,
> NoteTypesController.class, "create"); // If you called addDefaultRoutes for
> the NoteType entity, that route already exist)
>
> public WOActionResults createAction() {
> NoteType type = create(NoteType.ENTITY_NAME, yourerxkeyfilter());
> editingContext().saveChanges();
> return response(type, yourerxkeyfilter());
> }
>
> If you get a response with HTTP code in the 20x range, the object was created
> and now you can create your DeviceNoteType with a route like this:
>
> new ERXRoute(DeviceNoteType.ENTITY_NAME, "/DeviceNoteType",
> ERXRoute.Method.Post, DeviceNoteTypesController.class, "create");
>
> When you call POST /cgi-bin/WebObjects/MyApp.woa/ra/DeviceNoteType, you will
> have to pass the a Device and a NoteType object in JSON as the body of the
> request.
>
> I feel like I'm writing my WOWODC session in real-time :-P
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