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view doc/implementation.txt @ 5639:f576957cbb1f
Add support for prev/next/self links when returning paginated results.
To do this:
1) change "data" envelope from an array to a dict
2) move the "data" array to the "collection" property,
which is an array of elements in the collection.
3) add @links dict keyed by link relation: self, next, prev.
Each relation is an array of dicts with uri and rel keys.
In this case there is only one element, but there is nothing
preventing a relation from having multiple url's. So this follows
the formatting needed for the general case.
Relations are present only if it makes sense. So first page has no
prev and last page has no next.
4) add @total_size with number of element selected if they were
not paginated. Replicates data in X-Count-Total header.
Changed index to start at 1. So the first page is page_index 1 and not
page_index 0. (So I am no longer surprised when I set page_index to 1
and am missing a bunch of records 8-)).
Also a small fixup, json response ends with a newline so printing
the data, or using curl makes sure that anything printing after the
json output (like shell prompts) is on a new line.
Tests added for all cases.
| author | John Rouillard <rouilj@ieee.org> |
|---|---|
| date | Sat, 09 Mar 2019 11:06:10 -0500 |
| parents | 33a1f03b9de0 |
| children | 9ca128103a3a |
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==================== Implementation notes ==================== [see also the roundup package docstring] There have been some modifications to the spec. I've marked these in the source with 'XXX' comments when I remember to. In short: Class.find() - may match multiple properties, uses keyword args. Class.filter() - isn't in the spec and it's very useful to have at the Class level. CGI interface index view specifier layout part - lose the '+' from the sorting arguments (it's a reserved URL character ;). Just made no prefix mean ascending and '-' prefix descending. ItemClass - renamed to IssueClass to better match it only having one hypderdb class "issue". Allowing > 1 hyperdb class breaks the "superseder" multilink (since it can only link to one thing, and we'd want bugs to link to support and vice-versa). template - the call="link()" is handled by special-case mechanisms in my top-level CGI handler. In a nutshell, the handler looks for a method on itself called 'index%s' or 'item%s' where %s is a class. Most items pass on to the templating mechanism, but the file class _always_ does downloading. It'll probably stay this way too... template - call="link(property)" may be used to link "the current item" (from an index) - the link text is the property specified. template - added functions that I found very useful: List, History and Submit. template - items must specify the message lists, history, etc. Having them by default was sometimes not wanted. template - index view determines its default columns from the template's ``tal:condition="request/show/<property>"`` directives. template - menu() and field() look awfully similar now .... ;) roundup_admin.py - the command-line tool has a lot more commands at its disposal ----------------- Back to `Table of Contents`_ .. _`Table of Contents`: index.html