Fix #1500 (Custom ratings of increment 0.5 are allowed)

cps/templates/book_edit.html

@@ -159,9 +159,9 @@
             {% endif %}
 
             {% if c.datatype == 'rating' %}
-              <input type="number" min="1" max="5" step="1" class="form-control" name="{{ 'custom_column_' ~ c.id }}" id="{{ 'custom_column_' ~ c.id }}"
+              <input type="number" min="1" max="5" step="0.5" class="form-control" name="{{ 'custom_column_' ~ c.id }}" id="{{ 'custom_column_' ~ c.id }}"
                 {% if book['custom_column_' ~ c.id]|length > 0 %}
-                    value="{{ '%d' %  (book['custom_column_' ~ c.id][0].value / 2) }}"
+                    value="{{ '%.1f' %  (book['custom_column_' ~ c.id][0].value / 2) }}"
                 {% endif %}>
             {% endif %}
           </div>

cps/templates/detail.html

@@ -174,7 +174,7 @@
             {{ c.name }}:
             {% for column in entry['custom_column_' ~ c.id] %}
               {% if c.datatype == 'rating' %}
-                {{ '%d' % (column.value / 2) }}
+                {{ '%d' % (column.value / 2) }}{% if ((column.value /2) % 1) != 0 %}{{ '.%d' % (((column.value /2) % 1)*10) }} {% endif %}
               {% else %}
                 {% if c.datatype == 'bool' %}
                   {% if column.value == true %}

cps/templates/search_form.html

@@ -165,7 +165,7 @@
         {% endif %}
 
         {% if c.datatype == 'rating' %}
-          <input type="number" min="1" max="5" step="1" class="form-control" name="{{ 'custom_column_' ~ c.id }}" id="{{ 'custom_column_' ~ c.id }}">
+          <input type="number" min="1" max="5" step="0.5" class="form-control" name="{{ 'custom_column_' ~ c.id }}" id="{{ 'custom_column_' ~ c.id }}">
         {% endif %}
         </div>
       {% endfor %}

cps/web.py

@@ -1142,7 +1142,7 @@ def advanced_search():
                         db.cc_classes[c.id].value == custom_query))
                 elif c.datatype == 'rating':
                     q = q.filter(getattr(db.Books, 'custom_column_' + str(c.id)).any(
-                        db.cc_classes[c.id].value == int(custom_query) * 2))
+                        db.cc_classes[c.id].value == int(float(custom_query) * 2)))
                 else:
                     q = q.filter(getattr(db.Books, 'custom_column_' + str(c.id)).any(
                         func.lower(db.cc_classes[c.id].value).ilike("%" + custom_query + "%")))