🐛 fix the issue with attributed

src/Mangal.jl

@@ -58,6 +58,7 @@ export datasets, dataset
 export networks, network
 export references, reference
 export interactions, interaction
+export attributes, attribute
 
 # Datasets
 include(joinpath(".", "dataset.jl"))

src/response_format.jl

@@ -120,7 +120,7 @@ function format_mangal_response(::Type{MangalAttribute}, d::Dict{T,Any}) where {
     obj_id = d["id"]
     obj_name = d["name"]
     obj_description = d["description"]
-    obj_unit = d["unit"]
+    obj_unit = inothing(d["unit"]) ? missing : d["unit"]
 
     return MangalAttribute(obj_id, obj_name, obj_description, obj_unit)
 end

src/types.jl

@@ -5,7 +5,7 @@ struct MangalAttribute
     id::Int64
     name:: AbstractString
     description::AbstractString
-    unit::AbstractString
+    unit::Union{AbstractString,Missing}
 end
 
 """

test/attributes.jl

@@ -0,0 +1,11 @@
+module MangalTestAttributes
+    using Mangal
+    using Test
+    include("setup.jl")
+
+    @test typeof(attributes()) <: Vector{MangalAttributes}
+
+    n1 = attribute(6)
+    @test typeof(n1) <: MangalAttribute
+
+end

test/runtests.jl

@@ -5,6 +5,7 @@ my_tests = [
     "backbone.jl",
     "nodes.jl",
     "cache.jl",
+    "attributes.jl",
     "datasets.jl",
     "networks.jl",
     "interactions.jl"