More content and improve formatting

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@@ -42,7 +42,7 @@
     - Performance of idiomatic Rust is comparable to the performance
       of idiomatic cpp
 
-** Where to get infos
+** Where to get further information?
 
 *** Docs...
     - [[https://doc.rust-lang.org/book/][The rust book]] (~$ rustup docs --book~), [[https://doc.rust-lang.org/rust-by-example/][Rust by example]]
@@ -57,11 +57,19 @@
 ** What are we going to use?
 
 *** Definitely
+    :PROPERTIES:
+    :BEAMER_col: 0.45
+    :BEAMER_env: block
+    :END:
     - [[https://rocket.rs][rocket]]
     - [[https://diesel.rs][diesel]]
     - log
 
 *** Maybe
+    :PROPERTIES:
+    :BEAMER_col: 0.45
+    :BEAMER_env: block
+    :END:
     - anyhow
     - lettre
     - sha3
@@ -119,25 +127,124 @@
      - Testing (Unit tests)
      - Typed URIs
 
-** Where to get infos?
+** Where to get further information?
 
 *** Docs...
+    :PROPERTIES:
+    :BEAMER_col: 0.45
+    :BEAMER_env: block
+    :END:
+    - [[https://rocket.rs][rocket.rs]]
     - [[https://rocket.rs/v0.4/guide/][Rocket Guide]]
     - [[https://api.rocket.rs/v0.4/rocket/][Rocket API docs]]
     - [[https://github.com/SergioBenitez/Rocket/tree/v0.4/examples][Examples]]
 
 *** Chat
+    :PROPERTIES:
+    :BEAMER_col: 0.45
+    :BEAMER_env: block
+    :END:
     - Matrix: [[https://chat.mozilla.org/#/room/%23rocket:mozilla.org][#rocket:mozilla.org]]
     - IRC on Freenode: [[https://kiwiirc.com/client/chat.freenode.net/#rocket][#rocket]]
 
 * Diesel
 
 ** What is an ORM?
+   Object-relational-mapping is a programming technique for converting
+   data between incompatible type systems using the paradigms of your
+   programming language.
 
-** What is diesel capable of?
+*** Pros
+    :PROPERTIES:
+    :BEAMER_col: 0.45
+    :BEAMER_env: block
+    :END:
+    - Models are DRY (don't repeat yourself)
+    - Cleaner separation
+    - Prepared and sanitised queries
+    - Changes are versioned
+
+*** Cons
+    :PROPERTIES:
+    :BEAMER_col: 0.45
+    :BEAMER_env: block
+    :END:
+    - Debugging can get more complicated (performance)
+    - No need to learn SQL
+
+** Prerequisites ~diesel_cli~
+
+*** Setup Diesel for default DBMS
+    #+BEGIN_SRC sh
+    $ sudo apt install libpq-dev libsqlite3-dev \
+      default-libmysqlclient-dev
+    $ cargo install diesel_cli
+    #+END_SRC
+
+*** Setup Diesel for SQLite only
+    #+BEGIN_SRC sh
+    $ sudo apt install libsqlite3-dev
+    $ cargo install diesel_cli -no-default-features \
+      --features sqlite
+    #+END_SRC
+
+** How does that look in Rust
+
+*** Define a struct
+    :PROPERTIES:
+    :BEAMER_col: 0.50
+    :BEAMER_env: block
+    :END:
+    #+BEGIN_SRC rust
+    #[derive(Queryable)]
+    pub struct NewComment<'a> {
+        name: &'a str,
+        email: &'a str,
+        comment: &'a str,
+    }
+    #+END_SRC
+
+*** Insert something
+    :PROPERTIES:
+    :BEAMER_col: 0.45
+    :BEAMER_env: block
+    :END:
+    #+BEGIN_SRC rust
+    let user = NewUser {
+        name: "foo",
+        email: "foo@bar.baz",
+        comment: "A comment",
+    };
+
+    insert_into(comments)
+        .values(&user)
+        .execute(conn);
+    #+END_SRC
+
+** Where to get further information?
+
+*** Docs...
+    :PROPERTIES:
+    :BEAMER_col: 0.45
+    :BEAMER_env: block
+    :END:
+    - [[https://diesel.rs][diesel.rs]]
+    - [[https://diesel.rs/guides/][Diesel Guides]]
+    - [[https://docs.diesel.rs/master/diesel/index.html][Diesel API docs]]
+    - [[https://github.com/diesel-rs/diesel/tree/master/examples][Examples]] (minimalistic)
+
+*** Support
+    :PROPERTIES:
+    :BEAMER_col: 0.45
+    :BEAMER_env: block
+    :END:
+    - [[https://gitter.im/diesel-rs/diesel][Gitter]]
+    - [[https://discourse.diesel.rs/][Discourse Forum]]
 
 * Lets code something
 
+** Lets create a small web app
+
 * Conclusion
 
 ** What did we do?
@@ -147,12 +254,20 @@
 ** Two small projects
 
 *** [[https://git.onders.org/finga/ldap0r][ldap0r]]
+    :PROPERTIES:
+    :BEAMER_col: 0.45
+    :BEAMER_env: block
+    :END:
     - LDAP password reset tool
     - ($\sim$ 300 SloC)
     - First release
     - Tests
 
 *** [[https://git.onders.org/finga/filerly][filerly]]
+    :PROPERTIES:
+    :BEAMER_col: 0.45
+    :BEAMER_env: block
+    :END:
     - File sharing a la NextCloud
     - Not ready yet, work in progress...