created the initial migration

migrations/00000000000000_diesel_initial_setup/down.sql

@@ -0,0 +1,6 @@
+-- This file was automatically created by Diesel to setup helper functions
+-- and other internal bookkeeping. This file is safe to edit, any future
+-- changes will be added to existing projects as new migrations.
+
+DROP FUNCTION IF EXISTS diesel_manage_updated_at(_tbl regclass);
+DROP FUNCTION IF EXISTS diesel_set_updated_at();

migrations/00000000000000_diesel_initial_setup/up.sql

@@ -0,0 +1,36 @@
+-- This file was automatically created by Diesel to setup helper functions
+-- and other internal bookkeeping. This file is safe to edit, any future
+-- changes will be added to existing projects as new migrations.
+
+
+
+
+-- Sets up a trigger for the given table to automatically set a column called
+-- `updated_at` whenever the row is modified (unless `updated_at` was included
+-- in the modified columns)
+--
+-- # Example
+--
+-- ```sql
+-- CREATE TABLE users (id SERIAL PRIMARY KEY, updated_at TIMESTAMP NOT NULL DEFAULT NOW());
+--
+-- SELECT diesel_manage_updated_at('users');
+-- ```
+CREATE OR REPLACE FUNCTION diesel_manage_updated_at(_tbl regclass) RETURNS VOID AS $$
+BEGIN
+    EXECUTE format('CREATE TRIGGER set_updated_at BEFORE UPDATE ON %s
+                    FOR EACH ROW EXECUTE PROCEDURE diesel_set_updated_at()', _tbl);
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE FUNCTION diesel_set_updated_at() RETURNS trigger AS $$
+BEGIN
+    IF (
+        NEW IS DISTINCT FROM OLD AND
+        NEW.updated_at IS NOT DISTINCT FROM OLD.updated_at
+    ) THEN
+        NEW.updated_at := current_timestamp;
+    END IF;
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;

migrations/2019-11-13-074151_create_posts/down.sql

@@ -0,0 +1 @@
+DROP TABLE posts

migrations/2019-11-13-074151_create_posts/up.sql

@@ -0,0 +1,8 @@
+CREATE TABLE posts (
+  id SERIAL PRIMARY KEY,
+  title VARCHAR NOT NULL,
+  content TEXT NOT NULL,
+  published BOOLEAN NOT NULL DEFAULT 'f',
+  created_at TIMESTAMP NOT NULL DEFAULT NOW(),
+  updated_at TIMESTAMP NOT NULL DEFAULT NOW()
+)

src/models.rs

@@ -0,0 +1,15 @@
+extern crate chrono;
+extern crate serde;
+
+use chrono::NaiveDateTime;
+use serde::Serialize;
+
+#[derive(Queryable, Serialize)]
+pub struct Post {
+    pub id: i32,
+    pub title: String,
+    pub content: String,
+    pub published: bool,
+    pub created_at: NaiveDateTime,
+    pub updated_at: NaiveDateTime,
+}

src/schema.rs

@@ -0,0 +1,10 @@
+table! {
+    posts (id) {
+        id -> Int4,
+        title -> Varchar,
+        content -> Text,
+        published -> Bool,
+        created_at -> Timestamp,
+        updated_at -> Timestamp,
+    }
+}