So far when we've needed to make a new instance in the database, 0:00 we've used either the admin or a model form. 0:03 Both of these are excellent ways and probably the way you'll create almost all 0:05 of your model instances when you're using Django. 0:09 But 99% probability or 0:11 not, you need to know about three other handy ORM methods for creating records. 0:13 So sometimes you just need to make a model instance really quick. 0:19 You know the data is good, you don't wanna bother with a form, 0:22 you just gotta stick a thing into the database. 0:25 Django's ORM give us a really quick way to handle that using the create model. 0:27 I've already got courses imported, I need to import the user, 0:32 so django.contrib.auth.models import user. 0:37 Okay, cool. 0:41 So I want to make a new course for myself really quick. 0:42 So I'm gonna go ahead and get my user record out, so 0:45 get username equals kennethlove, I know that's me. 0:50 All right, cool, and now I wanna make a course. 0:55 So let's do course equals Course.objects.create 0:58 teacher equals teacher, me subject equals Python. 1:02 Big surprise right there and the title's gonna be Django Basics. 1:07 All right, and so now if I look at the id of the course, it's 24. 1:16 Now, I notice I didn't have to go and make a course instance. 1:20 I didn't have a call save, I didn't have to go fetch it afterwards. 1:23 Create is a wonderful shortcut, it inserts the record into the database and 1:26 then gives you back the record. 1:31 So course is now that course that I created in the database. 1:34 So that's really cool. 1:37 This only works for creating one thing though. 1:38 If you need to make several items, you're probably like a loop, loop,loop, but no, 1:40 don't make a loop. 1:44 You can but ideally you don't. 1:45 There's actually something that's a little bit easier to do which is a bulk create. 1:47 So we can do course.objects.bulk_create. 1:51 And you always pass both create and iterable of some kind. 1:59 So in this case, we're sending in a list and 2:02 inside that iterable, you have instances of the model that are not saved. 2:03 So we'll do a course where the teacher equals to teacher, 2:09 title equals Django Forms and the subject equals Python. 2:13 And then we'll do another one where the teacher equal teacher. 2:17 And just to get a little bit [INAUDIBLE] Django ORM and subect equals Python. 2:25 All right. And then we'll close our loop and 2:33 we'll close our call to bulk create. 2:35 And cool, we got back a list, 2:38 we could've assign that to an object if we wanted to a variable, but it's cool. 2:40 So now if we do a Course.objects.filter title contains Django. 2:44 Then cool, we've got Lacey's customizing Django templates and 2:53 we then have my own Django basic's string of forms and the current Django ORM. 2:57 So that's great, it created all the courses for us at once. 3:02 If we're doing this in a view with Django debug toolbar, 3:05 we'd only see a single query being run for inserting both of those records. 3:08 We wouldn't get two queries, we'd get one which is awesome. 3:12 So yey for being efficient. 3:16 You should also be able to figure out how to do this with a loop or 3:17 a list comprehension but you don't have to of course. 3:20 Speaking with efficiency, there's no reason to add records that we 3:22 don't need to add or to throw exceptions recklessly. 3:26 So just like we have the get object or 404 to save ourselves from having to catch 3:30 a missing record and throw a 404 when it doesn't exist. 3:35 We also have the get or 3:38 create method, well, let's quickly move through possible record data. 3:39 Get or create checks to see if a record exists using 3:43 all of the attributes that we give it. 3:46 If it does exist, we get that record back. 3:48 If it doesn't exist, it will create the record and give it back to us. 3:50 It also gives us back a boolean value of whether or not the record was created. 3:54 So for instance, let's try this, 3:58 course.objects.get or create, 4:02 teacher equals teacher, title equals Django forms. 4:07 And I get a back course and I get back false because it wasn't being created, 4:14 it already existed. 4:18 Let's change this a little bit here and let's go with the Django REST Framework. 4:20 All right. 4:27 This doesn't exist but some day it will, right? 4:30 [INAUDIBLE] And we get back to the course and 4:33 we get back true because it was created, all right. 4:35 Out of all these methods, I probably use get or create more than anything else. 4:39 I imagine you will too, so enjoy it. 4:43 I found that over the years I tend to use create a lot 4:48 when I'm playing with ideas in the shell. 4:50 It's a really handy way of building stuff quickly just to make sure that a model 4:52 method works or that I can select records the way I think I can. 4:55 Bulk create comes in really handy for 4:58 a lot of start up scripts like when a project first starts. 5:01 And get or create is one that is pretty much indispensable for 5:04 a lot of applications like when you're creating tags or categories and 5:07 want to only have one record of each tag. 5:10 I'm sure you'll find all sorts of ways that these three methods save you 5:13 time and trouble. 5:15