logos-storage/nim-json-rpc
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Fix #124

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jangko 2022-02-13 13:44:24 +07:00
parent 97ba55bbf6
commit 51fadf850c
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2 changed files with 44 additions and 7 deletions
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21
json_rpc/jsonmarshal.nim
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@ -243,26 +243,33 @@ proc jsonToNim*(params, jsonIdent: NimNode): NimNode =
jsonElement = quote do:
`jsonIdent`.elems[`pos`]
inc pos
# declare variable before assignment
result.add(quote do:
var `paramIdent`: `paramType`
)
# e.g. (A: int, B: Option[int], C: string, D: Option[int], E: Option[string])
if paramType.isOptionalArg:
let
nullAble = pos < minLength
innerType = paramType[1]
innerNode = jsonToNim(paramIdent, innerType, jsonElement, paramName, true)
if nullAble:
if pos >= minLength:
# allow both empty and null after mandatory args
# D & E fall into this category
result.add(quote do:
if `jsonIdent`.len > `pos` and `jsonElement`.kind != JNull: `innerNode`
)
else:
# allow null param for optional args between/before mandatory args
# B fall into this category
result.add(quote do:
if `jsonElement`.kind != JNull: `innerNode`
)
else:
result.add(quote do:
if `jsonIdent`.len >= `pos`: `innerNode`
)
else:
# mandatory args
# A and C fall into this category
# unpack Nim type and assign from json
result.add jsonToNim(paramIdent, paramType, jsonElement, paramName)
inc pos

30
tests/testrpcmacro.nim
View File

@ -79,6 +79,12 @@ s.rpc("rpc.optionalArg") do(val: int, obj: Option[MyOptional]) -> MyOptional:
else:
MyOptional(maybeInt: some(val))
s.rpc("rpc.optionalArg2") do(a, b: string, c, d: Option[string]) -> string:
var ret = a & b
if c.isSome: ret.add c.get()
if d.isSome: ret.add d.get()
return ret
type
OptionalFields = object
a: int
@ -211,8 +217,32 @@ suite "Server types":
int2 = MyOptional(maybeInt: some(117))
r1 = waitFor s.executeMethod("rpc.optionalArg", %[%117, %int1])
r2 = waitFor s.executeMethod("rpc.optionalArg", %[%117])
r3 = waitFor s.executeMethod("rpc.optionalArg", %[%117, newJNull()])
check r1 == %int1
check r2 == %int2
check r3 == %int2
test "Optional arg2":
let r1 = waitFor s.executeMethod("rpc.optionalArg2", %[%"A", %"B"])
check r1 == %"AB"
let r2 = waitFor s.executeMethod("rpc.optionalArg2", %[%"A", %"B", newJNull()])
check r2 == %"AB"
let r3 = waitFor s.executeMethod("rpc.optionalArg2", %[%"A", %"B", newJNull(), newJNull()])
check r3 == %"AB"
let r4 = waitFor s.executeMethod("rpc.optionalArg2", %[%"A", %"B", newJNull(), %"D"])
check r4 == %"ABD"
let r5 = waitFor s.executeMethod("rpc.optionalArg2", %[%"A", %"B", %"C", %"D"])
check r5 == %"ABCD"
let r6 = waitFor s.executeMethod("rpc.optionalArg2", %[%"A", %"B", %"C", newJNull()])
check r6 == %"ABC"
let r7 = waitFor s.executeMethod("rpc.optionalArg2", %[%"A", %"B", %"C"])
check r7 == %"ABC"
test "Mixed optional arg":
var ax = waitFor s.executeMethod("rpc.mixedOptionalArg", %[%10, %11, %"hello", %12, %"world"])