How should I represent many-to-many class and professor relationship using a REST API and Zend Framework? -

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i'm developing rest api using zend framework 1.12.3.

i've got 3 different resources: classes, subjects , professors. each class may have assigned multiple subjects, , each subject may have assigned 1 or multiple professors.

the schema this:

classes:     class:         id: 123         name: foo         subjects:             subject:                 id: 14                 name: chemistry                 professors:                     professor:                         id: 741                         name: jeremy clarkson                     professor:                         id: 963                         name: richard hammond             subject:                 id: 16                 name: physics                 professors:                     professor:                         id: 753                         name: james may

i wondering best approach list subjects , professors, both assigned , unassigned (on page actual assignment going take place).

should return assigned subjects , professors, , cross-reference id array containing subjects , professors?

or should return array containing subjects , professors, each having "assigned" variable set 0 or 1?

in other apis i've seen dealing assigned users projects done using first method (the api returns ids of assigned users, , client application cross-references ids array containing users). best practice regarding assignments ?

i suggest former method since data set required display concise list of subject/professors small compared latter method. if you're not doing already, i'd recommend using json data format. makes easy call method client-side js , create interesting representations.

based on initial list of subject/professor hierarchy easy match ids full set call suggest, or make call each professor id in set , details individual. if you're doing them via ajax, can run them in parallel: parallel asynchronous ajax requests using jquery


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