Add missing numeric avro types and bool

Closes #31

Author: opomuc

graphql/core/types.lua

@@ -205,7 +205,7 @@ end
 
 types.int = types.scalar({
   name = 'Int',
-  description = "The `Int` scalar type represents non-fractional signed whole numeric values. Int can represent values between -(2^31) and 2^31 - 1. ", 
+  description = "The `Int` scalar type represents non-fractional signed whole numeric values. Int can represent values between -(2^31) and 2^31 - 1. ",
   serialize = coerceInt,
   parseValue = coerceInt,
   parseLiteral = function(node)
@@ -226,6 +226,17 @@ types.float = types.scalar({
   end
 })
 
+types.double = types.scalar({
+  name = 'Double',
+  serialize = tonumber,
+  parseValue = tonumber,
+  parseLiteral = function(node)
+    if node.kind == 'double' or node.kind == 'int' then
+      return tonumber(node.value)
+    end
+  end
+})
+
 types.string = types.scalar({
   name = 'String',
   description = "The `String` scalar type represents textual data, represented as UTF-8 character sequences. The String type is most often used by GraphQL to represent free-form human-readable text.",

graphql/tarantool_graphql.lua

@@ -73,6 +73,18 @@ local function avro_type(avro_schema)
             return 'long'
         elseif avro_schema == 'long*' then
             return 'long*'
+        elseif avro_schema == 'double' then
+            return 'double'
+        elseif avro_schema == 'double*' then
+            return 'double*'
+        elseif avro_schema == 'float' then
+            return 'float'
+        elseif avro_schema == 'float*' then
+            return 'float*'
+        elseif avro_schema == 'boolean' then
+            return 'boolean'
+        elseif avro_schema == 'boolean*' then
+            return 'boolean*'
         elseif avro_schema == 'string' then
             return 'string'
         elseif avro_schema == 'string*' then
@@ -136,6 +148,18 @@ local function convert_scalar_type(avro_schema, opts)
         return types_long.nonNull
     elseif avro_t == 'long*' then
         return types_long
+    elseif avro_t == 'float' then
+        return types.float.nonNull
+    elseif avro_t == 'float*' then
+        return types.float
+    elseif avro_t == 'double' then
+        return types.double.nonNull
+    elseif avro_t == 'double*' then
+        return types.double
+    elseif avro_t == 'boolean' then
+        return types.boolean.nonNull
+    elseif avro_t == 'boolean*' then
+        return types.boolean
     elseif avro_t == 'string' then
         return types.string.nonNull
     elseif avro_t == 'string*' then