From 041c1dfe09f67988ab0438c67f0a64bd08933e0a Mon Sep 17 00:00:00 2001
From: Pedro <pedrooconradoo@gmail.com>
Date: Wed, 19 Aug 2020 13:05:44 -0300
Subject: [PATCH] =?UTF-8?q?Solu=C3=A7=C3=A3o=20para=20o=20problema=20dos?=
 =?UTF-8?q?=20m=C3=BAltiplos=20warnings?=
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---
 src/modifiers.jl | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/modifiers.jl b/src/modifiers.jl
index c6e38bc..32ac3f2 100644
--- a/src/modifiers.jl
+++ b/src/modifiers.jl
@@ -35,12 +35,14 @@ end
 #TODO: Verificar se tem colunas duplicatas
 FilterModifier(columns::Symbol...) = FilterModifier([columns...])
 
+const EasyWarnings = Set()
+warn(str::String, warnChecker::Set) = str in warnChecker || (@warn str) == nothing && push!(warnChecker, str) 
+
 function apply!(modifier::FilterModifier, data::DataFrame, event::Int)
     columns = Symbol[]
     for col in modifier.columns
         if !(col in propertynames(data))
-            #TODO: Colocar para avisar somente uma única vez do problema.
-            @warn "O stream não possui a $col"
+            warn("O stream não possui a $col", EasyWarnings)
         else
             push!(columns, col)
         end