Some advanced filters fail passed as JSON string do not work

[davecap]

This should be FALSE instead of TRUE:

solvebio-r/R/dataset.R

Line 126 in 4c68494

simplifyDataFrame = TRUE,

This works but is really ugly:

filters = list(
list(and=list(
list(or=list(
list(and=list(list("significance", "known"), list("allelefreq__gt", 0.01))),
list(and=list(list("significance", "likely"), list("allelefreq__gt", 0.2)))
)),
list(not=list("sample__in", c("X", "Y")))
))
)

The equivalent JSON is this, but does not work:

filters = '[
{"and": [
{"or": [
{"and": [["significance", "known"], ["allelefreq__gt", 0.01]]},
{"and": [["significance", "likely"], ["allelefreq__gt", 0.2]]}
]},
{"not": ["sample__in", ["X", "Y"]]}
]}
]'