83 files changed, 31 insertions, 48 deletions
diff --git a/src/client/elm/Dialog.elm b/src/client/Dialog.elm
index a7e059a..a7e059a 100644
--- a/src/client/elm/Dialog.elm
+++ b/src/client/Dialog.elm
diff --git a/src/client/elm/Dialog/AddCategory/Model.elm b/src/client/Dialog/AddCategory/Model.elm
index 8aeec1a..7496c2b 100644
--- a/src/client/elm/Dialog/AddCategory/Model.elm
+++ b/src/client/Dialog/AddCategory/Model.elm
@@ -13,7 +13,6 @@ import View.Date as Date
 import Form exposing (Form)
 import Form.Field as Field exposing (Field)
 import Form.Validate as Validate exposing (Validation)
-import Validation
 
 import Model.Translations exposing (Translations)
 import Model.Category exposing (Category, CategoryId)
diff --git a/src/client/elm/Dialog/AddCategory/View.elm b/src/client/Dialog/AddCategory/View.elm
index 6c02351..6c02351 100644
--- a/src/client/elm/Dialog/AddCategory/View.elm
+++ b/src/client/Dialog/AddCategory/View.elm
diff --git a/src/client/elm/Dialog/AddIncome/Model.elm b/src/client/Dialog/AddIncome/Model.elm
index ad7b25a..ad7b25a 100644
--- a/src/client/elm/Dialog/AddIncome/Model.elm
+++ b/src/client/Dialog/AddIncome/Model.elm
diff --git a/src/client/elm/Dialog/AddIncome/View.elm b/src/client/Dialog/AddIncome/View.elm
index b413308..b413308 100644
--- a/src/client/elm/Dialog/AddIncome/View.elm
+++ b/src/client/Dialog/AddIncome/View.elm
diff --git a/src/client/elm/Dialog/AddPayment/Model.elm b/src/client/Dialog/AddPayment/Model.elm
index a287d37..11d59b1 100644
--- a/src/client/elm/Dialog/AddPayment/Model.elm
+++ b/src/client/Dialog/AddPayment/Model.elm
@@ -64,7 +64,7 @@ validation categories =
   Validate.map6 Model
     (Validate.field "id" (Validate.maybe Validate.int))
     (Validate.field "name" (Validate.string |> Validate.andThen Validate.nonEmpty))
-    (Validate.field "cost" (Validate.int |> Validate.andThen (Validate.minInt 1)))
+    (Validate.field "cost" Validation.cost)
     (Validate.field "date" Validation.date)
     (Validate.field "category" (Validation.category categories))
     (Validate.field "frequency" Payment.validateFrequency)
diff --git a/src/client/elm/Dialog/AddPayment/View.elm b/src/client/Dialog/AddPayment/View.elm
index 078d5b7..078d5b7 100644
--- a/src/client/elm/Dialog/AddPayment/View.elm
+++ b/src/client/Dialog/AddPayment/View.elm
diff --git a/src/client/elm/Dialog/Model.elm b/src/client/Dialog/Model.elm
index d4fd484..ff8bc57 100644
--- a/src/client/elm/Dialog/Model.elm
+++ b/src/client/Dialog/Model.elm
@@ -3,16 +3,7 @@ module Dialog.Model exposing
   , init
   )
 
-import Date exposing (Date)
-import View.Date as Date
-
 import Form exposing (Form)
-import Form.Field as Field exposing (Field)
-import Form.Validate as Validate exposing (Validation)
-import Validation
-
-import Model.Payment as Payment exposing (Payment, Frequency, PaymentId)
-import Model.Translations exposing (Translations)
 
 import Dialog.AddPayment.Model as AddPayment
 import Dialog.AddIncome.Model as AddIncome
diff --git a/src/client/elm/Dialog/Msg.elm b/src/client/Dialog/Msg.elm
index 68ed146..68ed146 100644
--- a/src/client/elm/Dialog/Msg.elm
+++ b/src/client/Dialog/Msg.elm
diff --git a/src/client/elm/Dialog/Update.elm b/src/client/Dialog/Update.elm
index 3915548..3915548 100644
--- a/src/client/elm/Dialog/Update.elm
+++ b/src/client/Dialog/Update.elm
diff --git a/src/client/elm/Init.elm b/src/client/Init.elm
index d87e870..d87e870 100644
--- a/src/client/elm/Init.elm
+++ b/src/client/Init.elm
diff --git a/src/client/elm/LoggedData.elm b/src/client/LoggedData.elm
index 9bb0a7f..9bb0a7f 100644
--- a/src/client/elm/LoggedData.elm
+++ b/src/client/LoggedData.elm
diff --git a/src/client/elm/LoggedIn/Category/Model.elm b/src/client/LoggedIn/Category/Model.elm
index 7092fc4..7092fc4 100644
--- a/src/client/elm/LoggedIn/Category/Model.elm
+++ b/src/client/LoggedIn/Category/Model.elm
diff --git a/src/client/elm/LoggedIn/Category/Msg.elm b/src/client/LoggedIn/Category/Msg.elm
index 3184297..3184297 100644
--- a/src/client/elm/LoggedIn/Category/Msg.elm
+++ b/src/client/LoggedIn/Category/Msg.elm
diff --git a/src/client/elm/LoggedIn/Category/Table/View.elm b/src/client/LoggedIn/Category/Table/View.elm
index fa7a7b1..fa7a7b1 100644
--- a/src/client/elm/LoggedIn/Category/Table/View.elm
+++ b/src/client/LoggedIn/Category/Table/View.elm
diff --git a/src/client/elm/LoggedIn/Category/Update.elm b/src/client/LoggedIn/Category/Update.elm
index 1072ef0..1072ef0 100644
--- a/src/client/elm/LoggedIn/Category/Update.elm
+++ b/src/client/LoggedIn/Category/Update.elm
diff --git a/src/client/elm/LoggedIn/Category/View.elm b/src/client/LoggedIn/Category/View.elm
index 4e04fa2..4e04fa2 100644
--- a/src/client/elm/LoggedIn/Category/View.elm
+++ b/src/client/LoggedIn/Category/View.elm
diff --git a/src/client/elm/LoggedIn/Home/Header/View.elm b/src/client/LoggedIn/Home/Header/View.elm
index 3f8a320..3f8a320 100644
--- a/src/client/elm/LoggedIn/Home/Header/View.elm
+++ b/src/client/LoggedIn/Home/Header/View.elm
diff --git a/src/client/elm/LoggedIn/Home/Model.elm b/src/client/LoggedIn/Home/Model.elm
index ace1593..ace1593 100644
--- a/src/client/elm/LoggedIn/Home/Model.elm
+++ b/src/client/LoggedIn/Home/Model.elm
diff --git a/src/client/elm/LoggedIn/Home/Msg.elm b/src/client/LoggedIn/Home/Msg.elm
index b5f2566..b5f2566 100644
--- a/src/client/elm/LoggedIn/Home/Msg.elm
+++ b/src/client/LoggedIn/Home/Msg.elm
diff --git a/src/client/elm/LoggedIn/Home/Update.elm b/src/client/LoggedIn/Home/Update.elm
index b0ce256..b0ce256 100644
--- a/src/client/elm/LoggedIn/Home/Update.elm
+++ b/src/client/LoggedIn/Home/Update.elm
diff --git a/src/client/elm/LoggedIn/Home/View.elm b/src/client/LoggedIn/Home/View.elm
index 0b90e67..0b90e67 100644
--- a/src/client/elm/LoggedIn/Home/View.elm
+++ b/src/client/LoggedIn/Home/View.elm
diff --git a/src/client/elm/LoggedIn/Home/View/ExceedingPayers.elm b/src/client/LoggedIn/Home/View/ExceedingPayers.elm
index 6f2439c..6f2439c 100644
--- a/src/client/elm/LoggedIn/Home/View/ExceedingPayers.elm
+++ b/src/client/LoggedIn/Home/View/ExceedingPayers.elm
diff --git a/src/client/elm/LoggedIn/Home/View/Paging.elm b/src/client/LoggedIn/Home/View/Paging.elm
index dffe061..dffe061 100644
--- a/src/client/elm/LoggedIn/Home/View/Paging.elm
+++ b/src/client/LoggedIn/Home/View/Paging.elm
diff --git a/src/client/elm/LoggedIn/Home/View/Table.elm b/src/client/LoggedIn/Home/View/Table.elm
index 8828488..8828488 100644
--- a/src/client/elm/LoggedIn/Home/View/Table.elm
+++ b/src/client/LoggedIn/Home/View/Table.elm
diff --git a/src/client/elm/LoggedIn/Income/Model.elm b/src/client/LoggedIn/Income/Model.elm
index 7d852b9..7d852b9 100644
--- a/src/client/elm/LoggedIn/Income/Model.elm
+++ b/src/client/LoggedIn/Income/Model.elm
diff --git a/src/client/elm/LoggedIn/Income/Msg.elm b/src/client/LoggedIn/Income/Msg.elm
index 0a09dad..0a09dad 100644
--- a/src/client/elm/LoggedIn/Income/Msg.elm
+++ b/src/client/LoggedIn/Income/Msg.elm
diff --git a/src/client/elm/LoggedIn/Income/Update.elm b/src/client/LoggedIn/Income/Update.elm
index 0023c76..0023c76 100644
--- a/src/client/elm/LoggedIn/Income/Update.elm
+++ b/src/client/LoggedIn/Income/Update.elm
diff --git a/src/client/elm/LoggedIn/Income/View.elm b/src/client/LoggedIn/Income/View.elm
index 00a1646..00a1646 100644
--- a/src/client/elm/LoggedIn/Income/View.elm
+++ b/src/client/LoggedIn/Income/View.elm
diff --git a/src/client/elm/LoggedIn/Income/View/Table.elm b/src/client/LoggedIn/Income/View/Table.elm
index aa5e392..aa5e392 100644
--- a/src/client/elm/LoggedIn/Income/View/Table.elm
+++ b/src/client/LoggedIn/Income/View/Table.elm
diff --git a/src/client/elm/LoggedIn/Model.elm b/src/client/LoggedIn/Model.elm
index 6bcb0b2..6bcb0b2 100644
--- a/src/client/elm/LoggedIn/Model.elm
+++ b/src/client/LoggedIn/Model.elm
diff --git a/src/client/elm/LoggedIn/Msg.elm b/src/client/LoggedIn/Msg.elm
index a1379a6..a1379a6 100644
--- a/src/client/elm/LoggedIn/Msg.elm
+++ b/src/client/LoggedIn/Msg.elm
diff --git a/src/client/elm/LoggedIn/Stat/View.elm b/src/client/LoggedIn/Stat/View.elm
index f57316a..f57316a 100644
--- a/src/client/elm/LoggedIn/Stat/View.elm
+++ b/src/client/LoggedIn/Stat/View.elm
diff --git a/src/client/elm/LoggedIn/Update.elm b/src/client/LoggedIn/Update.elm
index 9e6d6ee..9e6d6ee 100644
--- a/src/client/elm/LoggedIn/Update.elm
+++ b/src/client/LoggedIn/Update.elm
diff --git a/src/client/elm/LoggedIn/View.elm b/src/client/LoggedIn/View.elm
index 2e42a73..2e42a73 100644
--- a/src/client/elm/LoggedIn/View.elm
+++ b/src/client/LoggedIn/View.elm
diff --git a/src/client/elm/LoggedIn/View/Format.elm b/src/client/LoggedIn/View/Format.elm
index f41e2cd..f41e2cd 100644
--- a/src/client/elm/LoggedIn/View/Format.elm
+++ b/src/client/LoggedIn/View/Format.elm
diff --git a/src/client/elm/Main.elm b/src/client/Main.elm
index 9674b66..9674b66 100644
--- a/src/client/elm/Main.elm
+++ b/src/client/Main.elm
diff --git a/src/client/elm/Model.elm b/src/client/Model.elm
index 5167e42..5167e42 100644
--- a/src/client/elm/Model.elm
+++ b/src/client/Model.elm
diff --git a/src/client/elm/Model/Category.elm b/src/client/Model/Category.elm
index 8b653a7..8b653a7 100644
--- a/src/client/elm/Model/Category.elm
+++ b/src/client/Model/Category.elm
diff --git a/src/client/elm/Model/Conf.elm b/src/client/Model/Conf.elm
index 308fa04..308fa04 100644
--- a/src/client/elm/Model/Conf.elm
+++ b/src/client/Model/Conf.elm
diff --git a/src/client/elm/Model/Date.elm b/src/client/Model/Date.elm
index bfba02f..bfba02f 100644
--- a/src/client/elm/Model/Date.elm
+++ b/src/client/Model/Date.elm
diff --git a/src/client/elm/Model/Income.elm b/src/client/Model/Income.elm
index 34578c6..34578c6 100644
--- a/src/client/elm/Model/Income.elm
+++ b/src/client/Model/Income.elm
diff --git a/src/client/elm/Model/Init.elm b/src/client/Model/Init.elm
index db7069f..db7069f 100644
--- a/src/client/elm/Model/Init.elm
+++ b/src/client/Model/Init.elm
diff --git a/src/client/elm/Model/InitResult.elm b/src/client/Model/InitResult.elm
index 7ce0be2..7ce0be2 100644
--- a/src/client/elm/Model/InitResult.elm
+++ b/src/client/Model/InitResult.elm
diff --git a/src/client/elm/Model/Payer.elm b/src/client/Model/Payer.elm
index 1663273..1663273 100644
--- a/src/client/elm/Model/Payer.elm
+++ b/src/client/Model/Payer.elm
diff --git a/src/client/elm/Model/Payment.elm b/src/client/Model/Payment.elm
index f61ded8..f61ded8 100644
--- a/src/client/elm/Model/Payment.elm
+++ b/src/client/Model/Payment.elm
diff --git a/src/client/elm/Model/PaymentCategory.elm b/src/client/Model/PaymentCategory.elm
index 87678fe..87678fe 100644
--- a/src/client/elm/Model/PaymentCategory.elm
+++ b/src/client/Model/PaymentCategory.elm
diff --git a/src/client/elm/Model/Size.elm b/src/client/Model/Size.elm
index f40fb01..f40fb01 100644
--- a/src/client/elm/Model/Size.elm
+++ b/src/client/Model/Size.elm
diff --git a/src/client/elm/Model/Translations.elm b/src/client/Model/Translations.elm
index 9b314e1..9b314e1 100644
--- a/src/client/elm/Model/Translations.elm
+++ b/src/client/Model/Translations.elm
diff --git a/src/client/elm/Model/User.elm b/src/client/Model/User.elm
index f6e8147..f6e8147 100644
--- a/src/client/elm/Model/User.elm
+++ b/src/client/Model/User.elm
diff --git a/src/client/elm/Model/View.elm b/src/client/Model/View.elm
index 61d42a7..61d42a7 100644
--- a/src/client/elm/Model/View.elm
+++ b/src/client/Model/View.elm
diff --git a/src/client/elm/Msg.elm b/src/client/Msg.elm
index cf592aa..cf592aa 100644
--- a/src/client/elm/Msg.elm
+++ b/src/client/Msg.elm
diff --git a/src/client/elm/Page.elm b/src/client/Page.elm
index 39232e0..39232e0 100644
--- a/src/client/elm/Page.elm
+++ b/src/client/Page.elm
diff --git a/src/client/elm/Server.elm b/src/client/Server.elm
index 7f25876..7f25876 100644
--- a/src/client/elm/Server.elm
+++ b/src/client/Server.elm
diff --git a/src/client/elm/SignIn/Model.elm b/src/client/SignIn/Model.elm
index 19d4305..19d4305 100644
--- a/src/client/elm/SignIn/Model.elm
+++ b/src/client/SignIn/Model.elm
diff --git a/src/client/elm/SignIn/Msg.elm b/src/client/SignIn/Msg.elm
index f753ebd..f753ebd 100644
--- a/src/client/elm/SignIn/Msg.elm
+++ b/src/client/SignIn/Msg.elm
diff --git a/src/client/elm/SignIn/Update.elm b/src/client/SignIn/Update.elm
index 98de777..98de777 100644
--- a/src/client/elm/SignIn/Update.elm
+++ b/src/client/SignIn/Update.elm
diff --git a/src/client/elm/SignIn/View.elm b/src/client/SignIn/View.elm
index 88f74b0..88f74b0 100644
--- a/src/client/elm/SignIn/View.elm
+++ b/src/client/SignIn/View.elm
diff --git a/src/client/elm/Tooltip.elm b/src/client/Tooltip.elm
index 4f70cda..4f70cda 100644
--- a/src/client/elm/Tooltip.elm
+++ b/src/client/Tooltip.elm
diff --git a/src/client/elm/Update.elm b/src/client/Update.elm
index 7006d5a..7006d5a 100644
--- a/src/client/elm/Update.elm
+++ b/src/client/Update.elm
diff --git a/src/client/elm/Utils/Cmd.elm b/src/client/Utils/Cmd.elm
index 5f41cbe..5f41cbe 100644
--- a/src/client/elm/Utils/Cmd.elm
+++ b/src/client/Utils/Cmd.elm
diff --git a/src/client/elm/Utils/Dict.elm b/src/client/Utils/Dict.elm
index 7d708e2..7d708e2 100644
--- a/src/client/elm/Utils/Dict.elm
+++ b/src/client/Utils/Dict.elm
diff --git a/src/client/elm/Utils/Either.elm b/src/client/Utils/Either.elm
index 275fc8c..275fc8c 100644
--- a/src/client/elm/Utils/Either.elm
+++ b/src/client/Utils/Either.elm
diff --git a/src/client/elm/Utils/Form.elm b/src/client/Utils/Form.elm
index 8d75a32..8d75a32 100644
--- a/src/client/elm/Utils/Form.elm
+++ b/src/client/Utils/Form.elm
diff --git a/src/client/elm/Utils/Http.elm b/src/client/Utils/Http.elm
index dd3870a..dd3870a 100644
--- a/src/client/elm/Utils/Http.elm
+++ b/src/client/Utils/Http.elm
diff --git a/src/client/elm/Utils/Json.elm b/src/client/Utils/Json.elm
index 29e815b..29e815b 100644
--- a/src/client/elm/Utils/Json.elm
+++ b/src/client/Utils/Json.elm
diff --git a/src/client/elm/Utils/List.elm b/src/client/Utils/List.elm
index cc57d9f..cc57d9f 100644
--- a/src/client/elm/Utils/List.elm
+++ b/src/client/Utils/List.elm
diff --git a/src/client/elm/Utils/Maybe.elm b/src/client/Utils/Maybe.elm
index 46456e1..46456e1 100644
--- a/src/client/elm/Utils/Maybe.elm
+++ b/src/client/Utils/Maybe.elm
diff --git a/src/client/elm/Utils/Search.elm b/src/client/Utils/Search.elm
index 1b70387..1b70387 100644
--- a/src/client/elm/Utils/Search.elm
+++ b/src/client/Utils/Search.elm
diff --git a/src/client/elm/Utils/String.elm b/src/client/Utils/String.elm
index 90fe68e..90fe68e 100644
--- a/src/client/elm/Utils/String.elm
+++ b/src/client/Utils/String.elm
diff --git a/src/client/elm/Validation.elm b/src/client/Validation.elm
index 18b3934..4781c3d 100644
--- a/src/client/elm/Validation.elm
+++ b/src/client/Validation.elm
@@ -1,5 +1,6 @@
 module Validation exposing
-  ( date
+  ( cost
+  , date
   , category
   )
 
@@ -9,30 +10,38 @@ import Date.Extra.Create exposing (dateFromFields)
 import Dict
 import String exposing (toInt, split)
 
-import Form.Validate as Validate exposing (..)
+import Form.Validate as Validate exposing (Validation)
 
 import Model.Category exposing (Categories, CategoryId)
 
+cost : Validation String Int
+cost =
+  Validate.customValidation Validate.int (\n ->
+    if n == 0
+      then Err (Validate.customError "CostMustNotBeNull")
+      else Ok n
+  )
+
 date : Validation String Date
 date =
-  customValidation string (\str ->
+  Validate.customValidation Validate.string (\str ->
     case split "/" str of
       [day, month, year] ->
         case (toInt day, toInt month, toInt year) of
           (Ok dayNum, Ok monthNum, Ok yearNum) ->
             Ok (dateFromFields yearNum (intToMonth monthNum) dayNum 0 0 0 0)
-          _ -> Err (customError "InvalidDate")
-      _ -> Err (customError "InvalidDate")
+          _ -> Err (Validate.customError "InvalidDate")
+      _ -> Err (Validate.customError "InvalidDate")
   )
 
 category : Categories -> Validation String CategoryId
 category categories =
-  customValidation string (\str ->
+  Validate.customValidation Validate.string (\str ->
     case toInt str of
       Ok category ->
         if List.member category (Dict.keys categories)
           then Ok category
-          else Err (customError "InvalidCategory")
+          else Err (Validate.customError "InvalidCategory")
       Err _ ->
-        Err (customError "InvalidCategory")
+        Err (Validate.customError "InvalidCategory")
   )
diff --git a/src/client/elm/View.elm b/src/client/View.elm
index 66c498a..66c498a 100644
--- a/src/client/elm/View.elm
+++ b/src/client/View.elm
diff --git a/src/client/elm/View/Color.elm b/src/client/View/Color.elm
index a2a20c7..a2a20c7 100644
--- a/src/client/elm/View/Color.elm
+++ b/src/client/View/Color.elm
diff --git a/src/client/elm/View/Date.elm b/src/client/View/Date.elm
index 35806ba..35806ba 100644
--- a/src/client/elm/View/Date.elm
+++ b/src/client/View/Date.elm
diff --git a/src/client/elm/View/Errors.elm b/src/client/View/Errors.elm
index 3e25c99..3e25c99 100644
--- a/src/client/elm/View/Errors.elm
+++ b/src/client/View/Errors.elm
diff --git a/src/client/elm/View/Events.elm b/src/client/View/Events.elm
index d71d67d..d71d67d 100644
--- a/src/client/elm/View/Events.elm
+++ b/src/client/View/Events.elm
diff --git a/src/client/elm/View/Form.elm b/src/client/View/Form.elm
index 7a4965d..7a4965d 100644
--- a/src/client/elm/View/Form.elm
+++ b/src/client/View/Form.elm
diff --git a/src/client/elm/View/Header.elm b/src/client/View/Header.elm
index 12fb87c..12fb87c 100644
--- a/src/client/elm/View/Header.elm
+++ b/src/client/View/Header.elm
diff --git a/src/client/elm/View/Plural.elm b/src/client/View/Plural.elm
index c36eaca..c36eaca 100644
--- a/src/client/elm/View/Plural.elm
+++ b/src/client/View/Plural.elm
diff --git a/src/client/js/main.js b/src/client/js/main.js
deleted file mode 100644
index 3c3d797..0000000
--- a/src/client/js/main.js
+++ /dev/null
@@ -1,17 +0,0 @@
-// Remove search query
-window.history.pushState(
-  {
-    html: document.documentElement.innerHTML,
-    pageTitle: document.title
-  },
-  '',
-  document.location.pathname + document.location.hash
-);
-
-var app = Elm.Main.fullscreen({
-  time: new Date().getTime(),
-  translations: JSON.parse(document.getElementById('translations').innerHTML),
-  conf: JSON.parse(document.getElementById('conf').innerHTML),
-  result: JSON.parse(document.getElementById('result').innerHTML),
-  windowSize: { width: window.innerWidth, height: window.innerHeight }
-});
diff --git a/src/server/Main.hs b/src/server/Main.hs
index b7764c9..7ae8c1c 100644
--- a/src/server/Main.hs
+++ b/src/server/Main.hs
@@ -1,22 +1,17 @@
 {-# LANGUAGE OverloadedStrings #-}
 
-import Web.Scotty
-
 import Network.Wai.Middleware.Static
-
-import Job.Daemon (runDaemons)
-
 import qualified Data.Text.Lazy as LT
+import Web.Scotty
 
-import qualified Controller.Index as Index
-import qualified Controller.SignIn as SignIn
-import qualified Controller.Payment as Payment
-import qualified Controller.Income as Income
-import qualified Controller.Category as Category
-
+import Job.Daemon (runDaemons)
 import Model.Database (runMigrations)
-
 import qualified Conf
+import qualified Controller.Category as Category
+import qualified Controller.Income as Income
+import qualified Controller.Index as Index
+import qualified Controller.Payment as Payment
+import qualified Controller.SignIn as SignIn
 
 main :: IO ()
 main = do
diff --git a/src/server/Model/Message/Key.hs b/src/server/Model/Message/Key.hs
index 36b3ba0..79ccf39 100644
--- a/src/server/Model/Message/Key.hs
+++ b/src/server/Model/Message/Key.hs
@@ -127,6 +127,7 @@ data Key =
   | Empty
   | InvalidString
   | InvalidDate
+  | CostMustNotBeNull
   | InvalidInt
   | InvalidCategory
   | SmallerIntThan
diff --git a/src/server/Model/Message/Translations.hs b/src/server/Model/Message/Translations.hs
index 6565344..16fc3fd 100644
--- a/src/server/Model/Message/Translations.hs
+++ b/src/server/Model/Message/Translations.hs
@@ -498,6 +498,11 @@ m l InvalidDate =
     English -> "day/month/year required"
     French  -> "jour/mois/année requis"
 
+m l CostMustNotBeNull =
+  case l of
+    English -> "Cost must not be zero"
+    French -> "Le coût ne doît pas être nul"
+
 m l InvalidInt =
   case l of
     English -> "Integer required"