set up admin.py

gab_salas_reading/bookshelf/admin.py

 from django.contrib import admin
-
+from .models import Books, Author
 # Register your models here.
+
+
+class AuthorAdmin(admin.ModelAdmin):
+    model = Author
+    search_fields = ('first_name', 'last_name', 'nationality', )
+    list_display = (
+            'first_name', 'last_name', 'age',
+            'nationality', 'bio',
+        )
+    list_filter = ('nationality', 'last_name', 'first_name', )
+    fieldsets = [
+        ('Author', {
+            'fields': [
+                    ('first_name', 'last_name', ),
+                    'age', 'nationality', 'bio'
+                ]
+        }),
+    ]
+
+class BooksAdmin(admin.ModelAdmin):
+    model = Books
+    search_fields = ('title', 'author', 'ISBN', )
+    list_display = (
+            'title', 'author', 'publisher',
+            'year_published', 'ISBN', 'blurb',
+        )
+    list_filter = ('title', 'author', 'ISBN', )
+    fieldsets = [
+        ('Books', {
+            'fields': [
+                    ('title', 'author', ),
+                    ('publisher', 'year_published', ), 'ISBN',
+                    'blurb'
+                ]
+        }),
+    ]
+
+
+admin.site.register(Author, AuthorAdmin)
+admin.site.register(Books, BooksAdmin)

gab_salas_reading/bookshelf/models.py

@@ -25,5 +25,5 @@ class Books(models.Model):
     blurb = models.TextField()
 
     def __str__(self):
-        return '{}: {}'.format(self.title, self.author)
+        return '{} by {}'.format(self.title, self.author)
 

gab_salas_reading/gab_salas_reading/settings.py

@@ -58,7 +58,7 @@ ROOT_URLCONF = 'gab_salas_reading.urls'
 TEMPLATES = [
     {
         'BACKEND': 'django.template.backends.django.DjangoTemplates',
-        'DIRS': [],
+        'DIRS': [os.path.join(BASE_DIR, 'templates')],
         'APP_DIRS': True,
         'OPTIONS': {
             'context_processors': [