Switch FLOAT types to DOUBLE in the database

SQLite has no NUMERIC(8,3) type, which it should acutally be.
Switch to DOUBLE, because FLOAT maps to f32 which is not supported
by GraphQL.

migrations/2019-06-08-190258_create_customers/up.sql

@@ -5,7 +5,7 @@ CREATE TABLE customers (
   "address_street" VARCHAR(255) NOT NULL,
   "email" VARCHAR(255) NOT NULL,
   "financial_contact" VARCHAR(255) NOT NULL,
-  "hourly_rate" FLOAT,
+  "hourly_rate" DOUBLE,
   "name" VARCHAR(255) NOT NULL,
   "phone" VARCHAR(255) NOT NULL,
   "short_name" VARCHAR(255) NOT NULL,

migrations/2019-06-08-190852_create_tasks/up.sql

@@ -1,12 +1,12 @@
 CREATE TABLE tasks (
   "id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
   "customer_id" INTEGER NOT NULL,
-  "fixed_cost" FLOAT,
-  "hourly_rate" FLOAT,
+  "fixed_cost" DOUBLE,
+  "hourly_rate" DOUBLE,
   "invoice_comment" VARCHAR(255) NOT NULL,
   "invoice_id" INTEGER,
   "name" VARCHAR(255) NOT NULL,
-  "vat_rate" FLOAT NOT NULL,
+  "vat_rate" DOUBLE NOT NULL,
   "created_at" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
   "updated_at" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
 )

src/models/customer.rs

@@ -23,7 +23,7 @@ pub struct Customer {
     /// The name of the financial contact person/department
     pub financial_contact: String,
     /// The default hourly rate (if applicable)
-    pub hourly_rate: Option<f32>,
+    pub hourly_rate: Option<f64>,
     /// The official (long) name
     pub name: String,
     /// The phone number
@@ -55,7 +55,7 @@ pub struct NewCustomer {
     /// The name of the financial contact person/department
     pub financial_contact: String,
     /// The default hourly rate (if applicable)
-    pub hourly_rate: Option<f32>,
+    pub hourly_rate: Option<f64>,
     /// The official (long) name
     pub name: String,
     /// The phone number

src/models/task.rs

@@ -18,9 +18,9 @@ pub struct Task {
     /// The ID of the associated customer
     pub customer_id: i32,
     /// The fixed cost of the task (if applicable)
-    pub fixed_cost: Option<f32>,
+    pub fixed_cost: Option<f64>,
     /// The hourly rate of the task (if applicable)
-    pub hourly_rate: Option<f32>,
+    pub hourly_rate: Option<f64>,
     /// An extra comment for on the invoice
     pub invoice_comment: String,
     /// The associated invoice (if billed)
@@ -28,7 +28,7 @@ pub struct Task {
     /// The name/description
     pub name: String,
     /// The VAT rate (at time of billing)
-    pub vat_rate: f32,
+    pub vat_rate: f64,
     /// The time of creation
     pub created_at: NaiveDateTime,
     /// The time of last update
@@ -45,9 +45,9 @@ pub struct NewTask {
     /// The ID of the associated customer
     pub customer_id: i32,
     /// The fixed cost of the task (if applicable)
-    pub fixed_cost: Option<f32>,
+    pub fixed_cost: Option<f64>,
     /// The hourly rate of the task (if applicable)
-    pub hourly_rate: Option<f32>,
+    pub hourly_rate: Option<f64>,
     /// An extra comment for on the invoice
     pub invoice_comment: String,
     /// The associated invoice (if billed)
@@ -55,5 +55,5 @@ pub struct NewTask {
     /// The name/description
     pub name: String,
     /// The VAT rate (at time of billing)
-    pub vat_rate: f32,
+    pub vat_rate: f64,
 }

src/schema.rs

@@ -181,10 +181,10 @@ table! {
         financial_contact -> Text,
         /// The `hourly_rate` column of the `customers` table.
         ///
-        /// Its SQL type is `Nullable<Float>`.
+        /// Its SQL type is `Nullable<Double>`.
         ///
         /// (Automatically generated by Diesel.)
-        hourly_rate -> Nullable<Float>,
+        hourly_rate -> Nullable<Double>,
         /// The `name` column of the `customers` table.
         ///
         /// Its SQL type is `Text`.
@@ -299,16 +299,16 @@ table! {
         customer_id -> Integer,
         /// The `fixed_cost` column of the `tasks` table.
         ///
-        /// Its SQL type is `Nullable<Float>`.
+        /// Its SQL type is `Nullable<Double>`.
         ///
         /// (Automatically generated by Diesel.)
-        fixed_cost -> Nullable<Float>,
+        fixed_cost -> Nullable<Double>,
         /// The `hourly_rate` column of the `tasks` table.
         ///
-        /// Its SQL type is `Nullable<Float>`.
+        /// Its SQL type is `Nullable<Double>`.
         ///
         /// (Automatically generated by Diesel.)
-        hourly_rate -> Nullable<Float>,
+        hourly_rate -> Nullable<Double>,
         /// The `invoice_comment` column of the `tasks` table.
         ///
         /// Its SQL type is `Text`.
@@ -329,10 +329,10 @@ table! {
         name -> Text,
         /// The `vat_rate` column of the `tasks` table.
         ///
-        /// Its SQL type is `Float`.
+        /// Its SQL type is `Double`.
         ///
         /// (Automatically generated by Diesel.)
-        vat_rate -> Float,
+        vat_rate -> Double,
         /// The `created_at` column of the `tasks` table.
         ///
         /// Its SQL type is `Timestamp`.