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luci-lib-json: ignore null keys to allow encoding empty objects

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There is currently no way to encode an empty object {}, as empty tables are
encoded as empty lists [].

With this patch, encode() will ignore table fields with the key json.null (which
doesn't make sense anyways). This allows adding a field with key json.null to
force encoding it as an object.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
This commit is contained in:
Matthias Schiffer 2015-06-04 21:03:24 +02:00
parent a835fc013b
commit 304eec2eba
1 changed files with 7 additions and 5 deletions
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12
libs/luci-lib-json/luasrc/json.lua
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@ -149,11 +149,13 @@ function Encoder.parse_iter(self, obj)
local first = true
for key, entry in pairs(obj) do
first = first or self:put(",")
first = first and false
self:parse_string(tostring(key))
self:put(":")
self:dispatch(entry)
if key ~= null then
first = first or self:put(",")
first = first and false
self:parse_string(tostring(key))
self:put(":")
self:dispatch(entry)
end
end
self:put("}")