Start with previous value or default values (1+0)

france/france_rsvp/templates/rsvp.html

@@ -10,11 +10,29 @@
     <form action="" method="POST">
       <p>
         <label for="adults">Adultes :</label>
-        <input type="number" name="adults" id="adults" min="1" max="5" />
+        <input
+          type="number"
+          name="adults" id="adults"
+          min="1" max="5"
+          {% if adults is not none %}
+            value="{{ adults }}"
+          {% else %}
+            value="1"
+          {% endif %}
+        />
       </p>
       <p>
         <label for="children">Enfants :</label>
-        <input type="number" name="children" id="children" min="0" max="5" />
+        <input
+          type="number"
+          name="children" id="children"
+          min="0" max="5"
+          {% if children is not none %}
+            value="{{ children }}"
+          {% else %}
+            value="0"
+          {% endif %}
+        />
       </p>
       <p><input type="submit" value="RSVP" /></p>
     </form>