Initialisierung: Übertragung aus altem Repository

nateman/templates/admin/sql_access.html.j2

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+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/admin/sql_access.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}SQL-Zugriff{% endblock %}
+{% block header %}SQL-Zugriff{% endblock %}
+
+{# result: Ergebnis einer SQL-Abfrage als sqlalchemy.engine.ResultProxy #}
+
+{% block content %}
+<p>
+  Diese Seite erlaubt direkten Zugriff auf die SQL-Datenbank von NateMan durch die Eingabe von SQL-Abfragen.<br>
+  <b>
+    Bei falscher Anwendung können Daten unwiderruflich verloren gehen.<br>
+    Außerdem kann es bei der Veränderung bestimmter Daten zu unerwarteten Fehlern in der NateMan-Anwendung kommen.<br>
+    <span class="marked">Benutzen Sie diese Seite nur, wenn Sie wissen, was Sie tun.</span>
+  </b>
+</p>
+
+<p>
+  {% set nateman_erm_url = url_for('static', filename='img/nateman-erm.svg') %}
+  <a href="{{ nateman_erm_url }}" target="_blank" rel="noreferrer noopener">
+    <img src="{{ nateman_erm_url }}" height="500" alt="Entity-Relationship-Modell der NateMan-Datenbank"
+         title="Entity-Relationship-Modell der NateMan-Datenbank">
+  </a>
+</p>
+
+<form method="post">
+  <p>
+    <textarea name="query" class="monospace" rows="8" cols="96" placeholder="SQL-Abfrage hier eingeben"
+              required autofocus>{{ query }}</textarea>
+  </p>
+
+  <p><input type="submit" value="Ausführen"></p>
+</form>
+
+{% if result is not none and result.returns_rows %}
+  {% set result_rows = result.fetchall() %}
+
+  <h3>Ergebnis ({{ result_rows|length }} Zeilen):</h3>
+
+  <table class="monospace">
+    <thead>
+      <tr>
+        {% for col_name in result.keys() %}
+          <th>{{ col_name }}</th>
+        {% endfor %}
+      </tr>
+    </thead>
+
+    <tbody>
+      {% for row in result_rows %}
+        <tr>
+          {% for value in row._mapping.values() %}
+            {% if value is none %}
+              <td class="detail">NULL</td>
+            {% else %}
+              <td>{{ value }}</td>
+            {% endif %}
+          {% endfor %}
+        </tr>
+      {% endfor %}
+    </tbody>
+  </table>
+{% endif %}
+{% endblock %}