Los archivos se guardan en la base de datos y se agregaron categorias

Si, creo que eso nada mas

files/templates/categories/create.html

@@ -0,0 +1,12 @@
+{% extends 'base.html' %}
+
+{% block title %}Categories{% endblock %}
+
+{% block content %}
+    <h3>Create a new Category</h3>
+    <form method="post">
+        <label for="name">~/name</label>
+        <input type="text" class="u-full-width" name="name" id="name">
+        <input type="submit" class="button-primary" value="create">
+    </form>
+{% endblock %}

files/templates/categories/index.html

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+{% extends 'base.html' %}
+
+{% block title %}category{% endblock %}
+
+{% block content %}
+    <div class="grid">
+        {% for category in categories %}
+            <a href="{{ url_for('categories.view', id=category.id) }}">{{ category.name }}</a>
+        {% endfor %}
+    </div>
+{% endblock %}
+
+

files/templates/categories/view.html

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+{% extends 'base.html' %}
+
+{% block title %}categories/view/{{ category.name }}{% endblock %}
+
+{% block content %}
+    <h3>{{ category.name }}</h3>
+    <div class="grid">
+        {% for file in files %}
+            <a href="{{ url_for('files.preview_file', id=file.id) }}">{{ file.filename }}</a>
+        {% endfor %}
+    </div>
+{% endblock %}
+