Возможность удалять фотографии из постов

forms/post.py

@@ -13,3 +13,4 @@ class AddPost(FlaskForm):
     link = TextAreaField('Вы можете оставить тут ссылки через пробел')
     public = BooleanField('Опубликовать?')
     submit = SubmitField('Сохранить')
+    del_photo = SubmitField('Удалить фотографию')

main.py

@@ -181,6 +181,13 @@ def add_question():
 def post_edit(id):
     global photo
     post_ed = AddPost()
+    ph_f = False
+    if post_ed.del_photo.data:
+        session = db_session.create_session()
+        post_exc = session.query(DiaryPost).filter(DiaryPost.id == id,
+                                                   DiaryPost.author == current_user.id).first()
+        post_exc.photo = None
+        session.commit()
     if request.method == "GET":
         session = db_session.create_session()
         post_exc = session.query(DiaryPost).filter(DiaryPost.id == id,
@@ -194,11 +201,12 @@ def post_edit(id):
             post_ed.link.data = post_exc.link
             if post_exc.photo:
                 photo = post_exc.photo
+                ph_f = True
             else:
                 photo = None
         else:
             abort(404)
-    if post_ed.validate_on_submit():
+    if post_ed.validate_on_submit() and not post_ed.del_photo.data:
         session = db_session.create_session()
         post_exc = session.query(DiaryPost).filter(DiaryPost.id == id,
                                                    DiaryPost.author == current_user.id).first()
@@ -210,14 +218,14 @@ def post_edit(id):
             post_exc.nig_emot = post_ed.nig_emot.data
             post_exc.link = post_ed.link.data
             if post_ed.photo.data:
-                post_exc.photo = save_photo(post_ed.photo, current_user.login, post=True, id_post=post_exc.id)
+                post_exc.photo = save_photo(post_ed.photo.data, current_user.login, post=True, id_post=post_exc.id)
             else:
                 post_exc.photo = photo
             session.commit()
             return redirect('/diary')
         else:
             abort(404)
-    return render_template('post.html', form=post_ed, message='', title='Изменить запись')
+    return render_template('post.html', form=post_ed, message='', title='Изменить запись', pht=ph_f)
 
 
 @app.route('/post_deleted/<int:id>', methods=['GET', 'POST'])

templates/post.html

@@ -29,6 +29,9 @@
         </div>
         {% endfor %}
         </p>
+        {% if pht %}
+        {{ form.del_photo(type="submit", class="btn btn-primary") }}
+        {% else %}
         <p>
             {{ form.photo.label }}<br>
             {{ form.photo(class="form-control") }}<br>
@@ -38,6 +41,7 @@
         </div>
         {% endfor %}
         </p>
+        {% endif %}
         <p>
             {{ form.pos_emot.label }}<br>
             {{ form.pos_emot(class="form-control") }}<br>
@@ -66,8 +70,8 @@
         {% endfor %}
         </p>
         <p>
-            <div class="box">{{ form.public(class="form-check-input")}} {{ form.public.label }}<br></div>
+        <div class="box">{{ form.public(class="form-check-input")}} {{ form.public.label }}<br></div>
-            {% for error in form.public.errors %}
+        {% for error in form.public.errors %}
         <div class="alert alert-danger" role="alert">
             {{ error }}
         </div>