don't fail in foodsoft_config without database,

and use proper config defaults so that configuration editing has
sensible default values

lib/foodsoft_config.rb

@@ -60,10 +60,14 @@ class FoodsoftConfig
     #
     #     FoodsoftConfig[:name] # => 'FC Test'
     #
+    # To avoid errors when the database is not yet setup (when loading
+    # the initial database schema), cached settings are only being read
+    # when the settings table exists.
+    #
     # @param key [String, Symbol]
     # @return [Object] Value of the key.
     def [](key)
-      if allowed_key?(key)
+      if RailsSettings::CachedSettings.table_exists? and allowed_key?(key)
         value = RailsSettings::CachedSettings["foodcoop.#{self.scope}.#{key}"]
         value = config[key] if value.nil?
         value
@@ -146,10 +150,13 @@ class FoodsoftConfig
     end
 
     # When new options are introduced, put backward-compatible defaults here, so that
-    # configuration files that haven't been updated, still work as they did.
+    # configuration files that haven't been updated, still work as they did. This also
+    # makes sure that the configuration editor picks up the defaults.
     def set_missing
       config.replace({
         use_nick: true,
+        use_wiki: true,
+        use_messages: true,
         use_apple_points: true,
         # English is the default language, and this makes it show up as default.
         default_locale: 'en',

lib/foodsoft_messages/lib/foodsoft_messages.rb

@@ -4,8 +4,8 @@ require "deface"
 
 module FoodsoftMessages
   # Return whether messages are used or not.
-  # Enabled by default since it used to be part of the foodsoft core.
+  # Enabled by default in {FoodsoftConfig} since it used to be part of the foodsoft core.
   def self.enabled?
-    FoodsoftConfig[:use_messages] != false
+    FoodsoftConfig[:use_messages]
   end
 end

lib/foodsoft_wiki/lib/foodsoft_wiki.rb

@@ -6,8 +6,8 @@ require 'foodsoft_wiki/engine'
 
 module FoodsoftWiki
   # Return whether the wiki is used or not.
-  # Enabled by default since it used to be part of the foodsoft core.
+  # Enabled by default in {FoodsoftConfig} since it used to be part of the foodsoft core.
   def self.enabled?
-    FoodsoftConfig[:use_wiki] != false
+    FoodsoftConfig[:use_wiki]
   end
 end