Upload to the good place

apps/participation/models.py

@@ -312,6 +312,15 @@ class Pool(models.Model):
         verbose_name_plural = _("pools")
 
 
+def get_solution_filename(instance, filename):
+    return f"solutions/{instance.participation.team.trigram}_{instance.problem}" \
+           + ("final" if instance.final_solution else "")
+
+
+def get_random_synthesis_filename(instance, filename):
+    return "syntheses/" + get_random_string(64)
+
+
 class Solution(models.Model):
     participation = models.ForeignKey(
         Participation,
@@ -331,14 +340,15 @@ class Solution(models.Model):
 
     file = models.FileField(
         verbose_name=_("file"),
-        upload_to="solutions/",
+        upload_to=get_solution_filename,
         unique=True,
         blank=True,
         default="",
     )
 
     def __str__(self):
-        return repr(self)
+        return _("Solution of team {team} for problem {problem}")\
+            .format(team=self.participation.team.name, problem=self.problem)
 
     class Meta:
         verbose_name = _("solution")
@@ -369,7 +379,7 @@ class Synthesis(models.Model):
 
     file = models.FileField(
         verbose_name=_("file"),
-        upload_to="syntheses/",
+        upload_to=get_random_synthesis_filename,
         unique=True,
         blank=True,
         default="",

apps/participation/templates/participation/participation_detail.html

@@ -19,9 +19,7 @@
                 <dt class="col-sm-2">{% trans "Solutions:" %}</dt>
                 <dd class="col-sm-10">
                     {% for solution in participation.solutions.all %}
-                        <a href="{% url "solution" filename=solution.file %}">
+                        <a href="{{ solution.file.url }}">{{ solution }}{% if not forloop.last %}, {% endif %}</a>
-                            {% blocktrans trimmed with problem=solution.problem %}problem {{ problem }}{% endblocktrans %}{% if not forloop.last %}, {% endif %}
-                        </a>
                     {% empty %}
                         {% trans "No solution was uploaded yet." %}
                     {% endfor %}
@@ -36,7 +34,7 @@
     {% trans "Upload solution" as modal_title %}
     {% trans "Upload" as modal_button %}
     {% url "participation:upload_solution" pk=participation.pk as modal_action %}
-    {% include "base_modal.html" with modal_id="uploadSolution" %}
+    {% include "base_modal.html" with modal_id="uploadSolution" modal_enctype="multipart/form-data" %}
 {% endblock %}
 
 {% block extrajavascript %}

apps/participation/templates/participation/upload_solution.html

@@ -3,7 +3,7 @@
 {% load crispy_forms_filters i18n %}
 
 {% block content %}
-    <form method="post">
+    <form method="post" enctype="multipart/form-data">
         <div id="form-content">
             {% csrf_token %}
             {{ form|crispy }}

apps/participation/views.py

@@ -456,11 +456,10 @@ class SolutionUploadView(LoginRequiredMixin, FormView):
         """
         form_sol = form.instance
         # Drop previous solution if existing
-        Solution.objects.filter(
+        for sol in Solution.objects.filter(participation=self.participation,
-            participation=self.participation,
+                                           problem=form_sol.problem,
-            problem=form_sol.problem,
+                                           final_solution=self.participation.final).all():
-            final_solution=self.participation.final,
+            sol.delete()
-        ).delete()
         form_sol.participation = self.participation
         form_sol.final = self.participation.final
         form_sol.save()