Implement support for sets and other improvements (#34)

* Add a boolean to define item as part of a set
* Add contextual help in admin
* Introduce support to sets and to item code lookup
Also review the url path for pagination

ram/portal/urls.py

@@ -4,6 +4,7 @@ from portal.views import (
     GetData,
     GetRoster,
     GetObjectsFiltered,
+    GetManufacturerItem,
     GetFlatpage,
     GetRollingStock,
     GetConsist,
@@ -20,7 +21,11 @@ from portal.views import (
 urlpatterns = [
     path("", GetData.as_view(template="home.html"), name="index"),
     path("roster", GetRoster.as_view(), name="roster"),
-    path("roster/<int:page>", GetRoster.as_view(), name="roster_pagination"),
+    path(
+        "roster/page/<int:page>",
+        GetRoster.as_view(),
+        name="roster_pagination"
+    ),
     path(
         "page/<str:flatpage>",
         GetFlatpage.as_view(),
@@ -32,13 +37,13 @@ urlpatterns = [
         name="consists"
     ),
     path(
-        "consists/<int:page>",
+        "consists/page/<int:page>",
         Consists.as_view(template="consists.html"),
         name="consists_pagination"
     ),
     path("consist/<uuid:uuid>", GetConsist.as_view(), name="consist"),
     path(
-        "consist/<uuid:uuid>/<int:page>",
+        "consist/<uuid:uuid>/page/<int:page>",
         GetConsist.as_view(),
         name="consist_pagination",
     ),
@@ -48,7 +53,7 @@ urlpatterns = [
         name="companies"
     ),
     path(
-        "companies/<int:page>",
+        "companies/page/<int:page>",
         Companies.as_view(template="companies.html"),
         name="companies_pagination",
     ),
@@ -58,7 +63,7 @@ urlpatterns = [
         name="manufacturers"
     ),
     path(
-        "manufacturers/<str:category>/<int:page>",
+        "manufacturers/<str:category>/page/<int:page>",
         Manufacturers.as_view(template="manufacturers.html"),
         name="manufacturers_pagination",
     ),
@@ -68,7 +73,7 @@ urlpatterns = [
         name="scales"
     ),
     path(
-        "scales/<int:page>",
+        "scales/page/<int:page>",
         Scales.as_view(template="scales.html"),
         name="scales_pagination"
     ),
@@ -78,7 +83,7 @@ urlpatterns = [
         name="types"
     ),
     path(
-        "types/<int:page>",
+        "types/page/<int:page>",
         Types.as_view(template="types.html"),
         name="types_pagination"
     ),
@@ -88,7 +93,7 @@ urlpatterns = [
         name="books"
     ),
     path(
-        "bookshelf/books/<int:page>",
+        "bookshelf/books/page/<int:page>",
         Books.as_view(template="bookshelf/books.html"),
         name="books_pagination"
     ),
@@ -99,17 +104,37 @@ urlpatterns = [
         name="search",
     ),
     path(
-        "search/<str:search>/<int:page>",
+        "search/<str:search>/page/<int:page>",
         SearchObjects.as_view(),
         name="search_pagination",
     ),
+    path(
+        "manufacturer/<str:manufacturer>",
+        GetManufacturerItem.as_view(),
+        name="manufacturer",
+    ),
+    path(
+        "manufacturer/<str:manufacturer>/page/<int:page>",
+        GetManufacturerItem.as_view(),
+        name="manufacturer_pagination",
+    ),
+    path(
+        "manufacturer/<str:manufacturer>/<str:search>",
+        GetManufacturerItem.as_view(),
+        name="manufacturer",
+    ),
+    path(
+        "manufacturer/<str:manufacturer>/<str:search>/page/<int:page>",
+        GetManufacturerItem.as_view(),
+        name="manufacturer_pagination",
+    ),
     path(
         "<str:_filter>/<str:search>",
         GetObjectsFiltered.as_view(),
         name="filtered",
     ),
     path(
-        "<str:_filter>/<str:search>/<int:page>",
+        "<str:_filter>/<str:search>/page/<int:page>",
         GetObjectsFiltered.as_view(),
         name="filtered_pagination",
     ),