Add simple weight report.

dashboard/templates/dashboard/child_button_group.html

@@ -18,6 +18,7 @@
             <a class="dropdown-item" href="{% url 'reports:report-diaperchange-lifetimes-child' object.slug %}">Diaper Lifetimes</a>
             <a class="dropdown-item" href="{% url 'reports:report-sleep-pattern-child' object.slug %}">Sleep Pattern</a>
             <a class="dropdown-item" href="{% url 'reports:report-sleep-totals-child' object.slug %}">Sleep Totals</a>
+            <a class="dropdown-item" href="{% url 'reports:report-weight-weight-child' object.slug %}">Weight</a>
         </div>
     </div>
 

reports/graphs/__init__.py

@@ -2,3 +2,4 @@ from .diaperchange_lifetimes import diaperchange_lifetimes  # NOQA
 from .diaperchange_types import diaperchange_types  # NOQA
 from .sleep_pattern import sleep_pattern  # NOQA
 from .sleep_totals import sleep_totals  # NOQA
+from .weight_weight import weight_weight  # NOQA

reports/graphs/weight_weight.py

@@ -0,0 +1,37 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+import plotly.offline as plotly
+import plotly.graph_objs as go
+
+from reports import utils
+
+
+def weight_weight(objects):
+    """
+    Create a graph showing weight over time.
+    :param objects: a QuerySet of Weight instances.
+    :returns: a tuple of the the graph's html and javascript.
+    """
+    objects = objects.order_by('-date')
+
+    trace = go.Scatter(
+        name='Weight',
+        x=list(objects.values_list('date', flat=True)),
+        y=list(objects.values_list('weight', flat=True)),
+        fill='tozeroy',
+    )
+
+    layout_args = utils.default_graph_layout_options()
+    layout_args['barmode'] = 'stack'
+    layout_args['title'] = '<b>Weight</b>'
+    layout_args['xaxis']['title'] = 'Date'
+    layout_args['xaxis']['rangeselector'] = utils.rangeselector_date()
+    layout_args['yaxis']['title'] = 'Weight'
+
+    fig = go.Figure({
+        'data': [trace],
+        'layout': go.Layout(**layout_args)
+    })
+    output = plotly.plot(fig, output_type='div', include_plotlyjs=False)
+    return utils.split_graph_output(output)

reports/templates/reports/weight_change.html

@@ -0,0 +1,13 @@
+{% extends 'reports/report_base.html' %}
+
+{% block title %}Weight - {{ object }}{% endblock %}
+
+{% block breadcrumbs %}
+    {{ block.super }}
+    <li class="breadcrumb-item active" aria-current="page">Weight</li>
+{% endblock %}
+
+{% block javascript %}
+    {{ block.super }}
+    {{ javascript|safe }}
+{% endblock %}

reports/tests/tests_views.py

@@ -44,3 +44,6 @@ class ViewsTestCase(TestCase):
         self.assertEqual(page.status_code, 200)
         page = self.c.get('{}/sleep/totals/'.format(base_url))
         self.assertEqual(page.status_code, 200)
+
+        page = self.c.get('{}/weight/weight/'.format(base_url))
+        self.assertEqual(page.status_code, 200)

reports/urls.py

@@ -19,4 +19,8 @@ urlpatterns = [
     url(r'^children/(?P<slug>[^/.]+)/reports/sleep/totals/$',
         views.SleepTotalsChildReport.as_view(),
         name='report-sleep-totals-child'),
+
+    url(r'^children/(?P<slug>[^/.]+)/reports/weight/weight/$',
+        views.WeightWeightChildReoport.as_view(),
+        name='report-weight-weight-child'),
 ]

reports/views.py

@@ -4,16 +4,16 @@ from __future__ import unicode_literals
 from django.contrib.auth.mixins import PermissionRequiredMixin
 from django.views.generic.detail import DetailView
 
-from core.models import Child, DiaperChange, Sleep
+from core import models
 
-from .graphs import (diaperchange_types, diaperchange_lifetimes, sleep_pattern,
-                     sleep_totals)
+from . import graphs
 
 
 class DiaperChangeLifetimesChildReport(PermissionRequiredMixin, DetailView):
-    """Graph of diaper changes by day and type.
     """
-    model = Child
+    Graph of diaper "lifetimes" - time between diaper changes.
+    """
+    model = models.Child
     permission_required = ('core.view_child',)
     template_name = 'reports/diaperchange_lifetimes.html'
 
@@ -21,17 +21,18 @@ class DiaperChangeLifetimesChildReport(PermissionRequiredMixin, DetailView):
         context = super(
             DiaperChangeLifetimesChildReport, self).get_context_data(**kwargs)
         child = context['object']
-        changes = DiaperChange.objects.filter(child=child)
+        changes = models.DiaperChange.objects.filter(child=child)
         if changes and changes.count() > 1:
-            context['html'], context['javascript'] = diaperchange_lifetimes(
-                changes)
+            context['html'], context['javascript'] = \
+                graphs.diaperchange_lifetimes(changes)
         return context
 
 
 class DiaperChangeTypesChildReport(PermissionRequiredMixin, DetailView):
-    """Graph of diaper changes by day and type.
     """
-    model = Child
+    Graph of diaper changes by day and type.
+    """
+    model = models.Child
     permission_required = ('core.view_child',)
     template_name = 'reports/diaperchange_types.html'
 
@@ -39,17 +40,18 @@ class DiaperChangeTypesChildReport(PermissionRequiredMixin, DetailView):
         context = super(DiaperChangeTypesChildReport, self).get_context_data(
             **kwargs)
         child = context['object']
-        changes = DiaperChange.objects.filter(child=child)
+        changes = models.DiaperChange.objects.filter(child=child)
         if changes:
-            context['html'], context['javascript'] = diaperchange_types(
-                changes)
+            context['html'], context['javascript'] = \
+                graphs.diaperchange_types(changes)
         return context
 
 
 class SleepPatternChildReport(PermissionRequiredMixin, DetailView):
-    """Graph of sleep pattern comparing sleep to wake times by day.
     """
-    model = Child
+    Graph of sleep pattern comparing sleep to wake times by day.
+    """
+    model = models.Child
     permission_required = ('core.view_child',)
     template_name = 'reports/sleep_pattern.html'
 
@@ -62,16 +64,18 @@ class SleepPatternChildReport(PermissionRequiredMixin, DetailView):
         context = super(SleepPatternChildReport, self).get_context_data(
             **kwargs)
         child = context['object']
-        instances = Sleep.objects.filter(child=child).order_by('start')
+        instances = models.Sleep.objects.filter(child=child).order_by('start')
         if instances:
-            context['html'], context['javascript'] = sleep_pattern(instances)
+            context['html'], context['javascript'] = \
+                graphs.sleep_pattern(instances)
         return context
 
 
 class SleepTotalsChildReport(PermissionRequiredMixin, DetailView):
-    """Graph of total sleep by day.
     """
-    model = Child
+    Graph of total sleep by day.
+    """
+    model = models.Child
     permission_required = ('core.view_child',)
     template_name = 'reports/sleep_totals.html'
 
@@ -84,7 +88,27 @@ class SleepTotalsChildReport(PermissionRequiredMixin, DetailView):
         context = super(SleepTotalsChildReport, self).get_context_data(
             **kwargs)
         child = context['object']
-        instances = Sleep.objects.filter(child=child).order_by('start')
+        instances = models.Sleep.objects.filter(child=child).order_by('start')
         if instances:
-            context['html'], context['javascript'] = sleep_totals(instances)
+            context['html'], context['javascript'] = \
+                graphs.sleep_totals(instances)
+        return context
+
+
+class WeightWeightChildReoport(PermissionRequiredMixin, DetailView):
+    """
+    Graph of weight change over time.
+    """
+    model = models.Child
+    permission_required = ('core.view_child',)
+    template_name = 'reports/weight_change.html'
+
+    def get_context_data(self, **kwargs):
+        context = super(WeightWeightChildReoport, self).get_context_data(
+            **kwargs)
+        child = context['object']
+        objects = models.Weight.objects.filter(child=child)
+        if objects:
+            context['html'], context['javascript'] = \
+                graphs.weight_weight(objects)
         return context