Speedup inlines using autocomplete field and add more previews

ram/bookshelf/admin.py

@@ -16,6 +16,7 @@ class BookPropertyInline(admin.TabularInline):
     model = BookProperty
     min_num = 0
     extra = 0
+    autocomplete_fields = ("property",)
 
 
 @admin.register(Book)

ram/consist/admin.py

@@ -8,7 +8,8 @@ class ConsistItemInline(SortableInlineAdminMixin, admin.TabularInline):
     model = ConsistItem
     min_num = 1
     extra = 0
-    readonly_fields = ("address", "type", "company", "era")
+    autocomplete_fields = ("rolling_stock",)
+    readonly_fields = ("preview", "address", "type", "company", "era")
 
 
 @admin.register(Consist)

ram/consist/models.py

@@ -60,6 +60,9 @@ class Meta(object):
     def __str__(self):
         return "{0}".format(self.rolling_stock)
 
+    def preview(self):
+        return self.rolling_stock.image.first().image_thumbnail(100)
+
     def type(self):
         return self.rolling_stock.rolling_class.type
 

ram/ram/__init__.py

@@ -1,4 +1,4 @@
 from ram.utils import git_suffix
 
-__version__ = "0.12.5"
+__version__ = "0.13.0"
 __version__ += git_suffix(__file__)

ram/ram/models.py

@@ -36,8 +36,8 @@ class Image(models.Model):
         storage=DeduplicatedStorage,
     )
 
-    def image_thumbnail(self):
-        return get_image_preview(self.image.url)
+    def image_thumbnail(self, max_size=150):
+        return get_image_preview(self.image.url, max_size)
 
     image_thumbnail.short_description = "Preview"
 

ram/ram/utils.py

@@ -44,10 +44,10 @@ def git_suffix(fname):
     return gh
 
 
-def get_image_preview(url):
+def get_image_preview(url, max_size=150):
     return format_html(
-        '<img src="%s" style="max-width: 150px; max-height: 150px;'
-        'background-color: #eee;" />' % url
+        '<img src="{src}" style="max-width: {size}px; max-height: {size}px;'
+        'background-color: #eee;" />'.format(src=url, size=max_size)
     )
 
 

ram/roster/admin.py

@@ -16,11 +16,13 @@ class RollingClassPropertyInline(admin.TabularInline):
     model = RollingClassProperty
     min_num = 0
     extra = 0
+    autocomplete_fields = ("property",)
 
 
 @admin.register(RollingClass)
 class RollingClass(admin.ModelAdmin):
     inlines = (RollingClassPropertyInline,)
+    autocomplete_fields = ("manufacturer",)
     list_display = ("__str__", "type", "company")
     list_filter = ("company", "type__category", "type")
     search_fields = (
@@ -50,6 +52,7 @@ class RollingStockPropertyInline(admin.TabularInline):
     model = RollingStockProperty
     min_num = 0
     extra = 0
+    autocomplete_fields = ("property",)
 
 
 class RollingStockJournalInline(admin.TabularInline):
@@ -104,7 +107,8 @@ class RollingStockAdmin(SortableAdminBase, admin.ModelAdmin):
         RollingStockDocInline,
         RollingStockJournalInline,
     )
-    readonly_fields = ("creation_time", "updated_time")
+    autocomplete_fields = ("rolling_class",)
+    readonly_fields = ("preview", "creation_time", "updated_time")
     list_display = (
         "__str__",
         "address",
@@ -136,6 +140,7 @@ class RollingStockAdmin(SortableAdminBase, admin.ModelAdmin):
             None,
             {
                 "fields": (
+                    "preview",
                     "rolling_class",
                     "road_number",
                     "scale",

ram/roster/models.py

@@ -120,6 +120,9 @@ def __str__(self):
     def get_absolute_url(self):
         return reverse("rolling_stock", kwargs={"uuid": self.uuid})
 
+    def preview(self):
+        return self.image.first().image_thumbnail(350)
+
     def country(self):
         return str(self.rolling_class.company.country)