Add rota-builder summary to detail view with weeks, shifts, and workers count

djangorota/djangorota/templates/rota/rota_detail.html

@@ -11,6 +11,19 @@
       <p class="subtitle">{{ rota.description }}</p>
       <p>Period: {{ rota.start_date }} → {{ rota.end_date }}</p>
 
+      <div class="box" style="margin-top:0.75rem;">
+        <h2 class="subtitle is-6">RotaBuilder summary</h2>
+        <div class="columns is-mobile is-multiline" style="margin-bottom:0.5rem;">
+          <div class="column is-narrow"><strong>Weeks</strong></div>
+          <div class="column">{{ weeks_to_rota|default:'—' }}</div>
+          <div class="column is-narrow"><strong>Shifts</strong></div>
+          <div class="column">{{ shift_count|default:'—' }}</div>
+          <div class="column is-narrow"><strong>Workers</strong></div>
+          <div class="column">{{ worker_count|default:'—' }}</div>
+        </div>
+        {# constraints sample intentionally omitted here; keep summary compact #}
+      </div>
+
       <div class="mb-4">
         <p>
           <button class="button is-link" hx-get="{% url 'rota:worker_add' %}?rota_id={{ rota.id }}" hx-target="#modal" hx-swap="innerHTML">Add worker</button>

djangorota/rota/forms.py

@@ -441,6 +441,77 @@ class RotaScheduleForm(forms.ModelForm):
             self.fields["end_date"].initial = end_date
         return cleaned
 
+    def save(self, commit=True):
+        """Save the RotaSchedule and persist dynamic `opt__*` fields into
+        `instance.options`.
+
+        This persists both typed constraint option fields (created from
+        RotaConstraintOptions) and the small set of builder-argument fields
+        (created in __init__). For structured fields we attempt to parse JSON
+        textareas into Python objects.
+        """
+        instance = super().save(commit=False)
+
+        opts = instance.options or {}
+
+        # Persist typed constraint option fields using inferred defaults map
+        try:
+            defaults = getattr(self, "_constraint_defaults", {}) or {}
+        except Exception:
+            defaults = {}
+
+        for key, default in defaults.items():
+            field_name = f"opt__{key}"
+            if field_name in self.cleaned_data:
+                val = self.cleaned_data[field_name]
+                if isinstance(default, (list, dict)):
+                    # JSON textarea
+                    try:
+                        parsed = json.loads(val) if val is not None and val != "" else []
+                    except Exception:
+                        parsed = val
+                    opts[key] = parsed
+                else:
+                    if val == "" or val is None:
+                        opts[key] = None
+                    else:
+                        opts[key] = val
+
+        # Persist any remaining opt__ fields (builder args and others)
+        for fname, val in self.cleaned_data.items():
+            if not fname.startswith("opt__"):
+                continue
+            key = fname[5:]
+            if key in defaults:
+                # already handled
+                continue
+            v = val
+            # Try to parse JSON-like strings into structures
+            if isinstance(v, str):
+                s = v.strip()
+                if s.startswith("[") or s.startswith("{"):
+                    try:
+                        v = json.loads(v)
+                    except Exception:
+                        pass
+            opts[key] = v
+
+        # Persist the top-level 'weeks' value from the form into options so
+        # the builder can prefer this explicit value instead of deriving it
+        # from end_date. Do not persist end_date itself here.
+        try:
+            weeks_val = self.cleaned_data.get("weeks")
+            if weeks_val is not None:
+                opts["weeks"] = int(weeks_val)
+        except Exception:
+            pass
+
+        instance.options = opts
+
+        if commit:
+            instance.save()
+        return instance
+
 
 class WorkerSelfServiceForm(forms.ModelForm):
     """Small form exposed to workers via tokenized links so they can set

djangorota/rota/models.py

@@ -55,14 +55,34 @@ class RotaSchedule(models.Model):
 			)
 
 		# compute weeks_to_rota (integer number of weeks)
-		delta = self.end_date - self.start_date
-		weeks_to_rota = max(1, int(delta.days // 7))
+		# Prefer an explicit value stored in `self.options['weeks']` (set by
+		# the rota edit form). If absent, fall back to deriving from the
+		# stored end_date (backwards compatible).
+		opts_preview = dict(self.options or {})
+		weeks_opt = None
+		if "weeks" in opts_preview:
+			try:
+				weeks_opt = int(opts_preview.get("weeks"))
+			except Exception:
+				weeks_opt = None
+		if weeks_opt is not None:
+			weeks_to_rota = max(1, weeks_opt)
+		else:
+			delta = self.end_date - self.start_date
+			weeks_to_rota = max(1, int(delta.days // 7))
 
 		# Build kwargs for RotaBuilder from any explicit builder args stored in
 		# `self.options` (kept for backward compatibility), and treat the
 		# remaining keys as constraint options which should map to
 		# `RotaConstraintOptions`.
 		opts = dict(self.options or {})
+		# Remove 'weeks' from opts before handing to constraint options so
+		# it doesn't cause validation failures in RotaConstraintOptions.
+		if "weeks" in opts:
+			try:
+				opts.pop("weeks")
+			except Exception:
+				pass
 		builder_keys = [
 			"balance_offset_modifier",
 			"ltft_balance_offset",

djangorota/rota/views.py

@@ -191,6 +191,31 @@ def rota_detail(request, rota_id):
 	except Exception:
 		configured_constraints = {}
 
+	# Compute a small rota-builder summary for display in the template
+	try:
+		# Prefer explicit value stored in rota.options['weeks'] when present.
+		opts = rota.options or {}
+		if "weeks" in opts:
+			try:
+				weeks_to_rota = max(1, int(opts.get("weeks")))
+			except Exception:
+				weeks_to_rota = None
+		else:
+			delta = rota.end_date - rota.start_date
+			weeks_to_rota = max(1, int(delta.days // 7))
+	except Exception:
+		weeks_to_rota = None
+
+	try:
+		shift_count = len(rota.shifts or [])
+	except Exception:
+		shift_count = None
+
+	try:
+		worker_count = rota.workers.count()
+	except Exception:
+		worker_count = None
+
 	# legacy RotaOptionsForm not used here; we provide a typed RotaScheduleForm below
 
 	# Provide a typed RotaScheduleForm instance so the template can render
@@ -205,7 +230,15 @@ def rota_detail(request, rota_id):
 	return render(
 		request,
 		"rota/rota_detail.html",
-		{"rota": rota, "options_form": typed_form, "available_constraints": available_constraints_rich, "configured_constraints": configured_constraints},
+		{
+			"rota": rota,
+			"options_form": typed_form,
+			"available_constraints": available_constraints_rich,
+			"configured_constraints": configured_constraints,
+			"weeks_to_rota": weeks_to_rota,
+			"shift_count": shift_count,
+			"worker_count": worker_count,
+		},
 	)