ArangoDB 和 Foxx - 来自 GET 的多个查询参数

Question

(sorry for the newbie question, but can't find it easily in documentation)

I want to have a document store with a few models, and then use some of the attributes as parameters in queries, in my Foxx services. Say I have a db for movies and series episodes:

{
    'type':'movie',
    'year':'1997',
    'director':'xxxxxxx',
    ...
},
{
    'type':'series_episode',
    'season':'1',
    'episode':'3',
    ...
}
...

I need to be able to search on

Of course what I would like to do is to have a single router that would support both GET /?type=movie&year=x&director=y.. GET /?type=series&season=x&episode=y Is that possible? Easy to do?

I couldn't find out, so I started thinking that I have to have different routers for each of the types, like this:

router.get('/movies', function (req, res) {
        const data = db._query('FOR entry IN mystore FILTER entry.type == @type, entry.year == @year RETURN entry ', 
        {'type':'movie', .....});
                res.json({
                    result: data
                })
});


router.get('/series', function (req, res) {
        const data = db._query('FOR entry IN mystore FILTER entry.type == @type, entry.season == @season, entry.episode == @episode, RETURN entry ', 
        {'type':'series', .....});
                res.json({
                    result: data
                })
})

That would be heavy work to maintain. Ideally I would just update the models and use one single router.

Even for this last option I had a question: How do i pass more than one parameters to the query? I can't find the syntax.

Any help is appreciated. I am learning ArangoDB and I am very interested in the potential, but I can't navigate around the documentation I saw or examples.

Thank you

Answer 1

This question is meanwhile covered in the Foxx Manual and in detail in the endpoints documentation .

Query parameters can accessed by specifying queryParam(...) s to the JOI-router definition, and later on in the function body they can be accessed via req.queryParams.yourQueryParam .

Please note that you can use the API -Tab in the webinterface to use swagger to explore your API interactively.

A very simple Foxx service accepting two query parameters could look like this:

'use strict';

const joi = require('joi');

const router = require('@arangodb/foxx/router')();
module.context.use(router);
router.get('/hello/', function (req, res) {
    res.send(JSON.stringify({hello: `world of FirstName: ${req.queryParams.fname} LastName: ${req.queryParams.lname}`}));
})
.queryParam('fname', joi.string().required(), 'First Name to greet.')
.queryParam('lname', joi.string().required(), 'Last Name to greet.')
.response(['text/plain'], 'A personalized greeting.')
.summary('Personalized greeting')
.description('Prints a personalized greeting.');

An invocation could look like this:

curl -X GET "http://127.0.0.1:8529/_db/_system/myfoxx/hello?fname=Joe&lname=Smith"
...
{"hello":"world of FirstName: Joe LastName: Smith"}

In Path parameters could be achieved like this:

'use strict';

const joi = require('joi');

const router = require('@arangodb/foxx/router')();
module.context.use(router);
router.get('/hello/:fname/:lname', function (req, res) {
    res.send(JSON.stringify({hello: `world of FirstName: ${req.pathParams.fname} LastName: ${req.pathParams.lname}`}));
})
.pathParam('fname', joi.string().required(), 'First Name to greet.')
.pathParam('lname', joi.string().required(), 'Last Name to greet.')
.response(['text/plain'], 'A personalized greeting.')
.summary('Personalized greeting')
.description('Prints a personalized greeting.');

And an invocation could be done like this:

curl -X GET "http://127.0.0.1:8529/_db/_system/myfoxx/hello/Joe/Smith" 
...
{"hello":"world of FirstName: Joe LastName: Smith"}