# Help with JSON2.jl
**URL:** https://discourse.julialang.org/t/help-with-json2-jl/31433
**Category:** General Usage
**Created:** [November 23, 2019, 8:39pm UTC](https://discourse.julialang.org/t/help-with-json2-jl/31433 "2019-11-23T20:39:50Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@cwiese](https://discourse.julialang.org/u/cwiese)
#### Post date: [November 23, 2019, 8:39pm UTC](https://discourse.julialang.org/t/help-with-json2-jl/31433/1 "2019-11-23T20:39:50Z")
What am I doing wrong here? I get **ERROR:** MethodError: no method matching nQ
```julia
julia> mutable struct Q
name::String
scens::Vector{String}
nQ(name, scens) = new(name,scens)
end
julia> q1 = """{
"name": "q1",
"scens": ["M00000001"]
}"""
julia> JSON2.read(q1, Q)
ERROR: MethodError: no method matching Q(::String, ::Array{String,1})
```
---
### Author:  [@jling](https://discourse.julialang.org/u/jling)
#### Post date: [November 23, 2019, 9:15pm UTC](https://discourse.julialang.org/t/help-with-json2-jl/31433/2 "2019-11-23T21:15:32Z")
> [@cwiese](#):
>
> nQ(name, scens) = new(name,scens)
remove this line or change `nQ` into `Q`
---
### Author:  [@cwiese](https://discourse.julialang.org/u/cwiese)
#### Post date: [November 23, 2019, 9:46pm UTC](https://discourse.julialang.org/t/help-with-json2-jl/31433/3 "2019-11-23T21:46:56Z")
thanks, that was a typo from reducing my issue… I will add the rest of the properties
---
### Author:  [@cwiese](https://discourse.julialang.org/u/cwiese)
#### Post date: [November 24, 2019, 12:59am UTC](https://discourse.julialang.org/t/help-with-json2-jl/31433/4 "2019-11-24T00:59:39Z")
Okay here is the full version (and thanks for looking)
```julia
using JSON2
struct ClientSortBy
colName::String
revDir::Int32 # 0 asc 1 desc
ClientSortBy(colName::String, revDir::Int32) = new(colName,revDir)
ClientSortBy(d::Dict{String, Any}) = new(d["colName"], d["revDir"])
end
struct ClientFilter
colName::String
colAttr::String
ClientFilter(colName::String, colAttr::String) = new(colName,colAttr)
ClientFilter(d::Dict{String, Any}) = new(d["colName"], d["colAttr"])
end
mutable struct ClientnQ
name::String
scens::Vector{String}
joinScens::Vector{String}
filters::Vector{Vector{ClientFilter}}
groupBy::Vector{Vector{String}}
msrs::Vector{String}
joinMsrs::Vector{String}
sortBy::Vector{ClientSortBy}
ClientnQ(name,scens,joinScens,filters,groupBy,msrs,joinMsrs,sortBy) =
new(name,scens,joinScens,map(f->map(i->ClientFilter(i["colName"],i["colAttr"]),f),filters),groupBy,msrs,joinMsrs,map(s->ClientSortBy(s["colName"],s["revDir"]),sortBy))
end
q1 = """{
"name": "q1",
"scens": ["M00000001"],
"joinScens": [],
"filters": [[{"colName": "ENC_TYPE", "colAttr": "Inpatient"}]],
"groupBy":[["PAT_CLASS"],[]],
"msrs":["NET_REVENUE"],
"joinMsrs":[],
"sortBy":[{ "colName": "PAT_CLASS", "revDir":0}]
}"""
JSON2.read(q1,ClientnQ)
```
I get " **ERROR:** MethodError: no method matching getindex(::ClientFilter, ::String)"
---
### Author:  [@cwiese](https://discourse.julialang.org/u/cwiese)
#### Post date: [November 24, 2019, 1:57pm UTC](https://discourse.julialang.org/t/help-with-json2-jl/31433/5 "2019-11-24T13:57:33Z")
never mind … the whole point of JSON2 was that is attempt to constructs the type … so this was not needed : map(f-\>map(i-\>ClientFilter(i[“colName”],i[“colAttr”]),f),filters)