Django Tutorial for Beginners - 31 - ModelForm and CreateView Video Lecture | Django: The Ultimate Beginners Guide - Back-End Programming

alright guys so now that we made a form
using model forms what we need to do now
is we actually need to make a template
using HTML so we have somewhere to plug
it into so this is actually pretty
important the way that you name it
whenever you're using model forms the
default name actually let me go ahead
and right-click and make a new HTML file
again make sure it's in templates and
then your apps directory which should be
music or whatever your app name is it
needs to be the model name underscore
form in the model name is in lower case
so in this case I am making a form for
creating new albums so I'm just going to
album underscore form whenever we make a
form for making new songs it's going to
be song underscore form but again it's
whatever the name of your model is all
in lowercase that I say under case I
don't think I did if I did that would be
embarrassing underscore form so that's
the default file that it's going to look
at and that is why if you're looking
through reviews in like alright where
did I specify the template name we
didn't because we don't need to pretty
cool and actually let me go ahead and
pause my video and make the core
bootstrap shell alright so I just made
an empty panel in other words we're just
going to have a white square and then my
form is going to go right in here but
again it doesn't really matter how you
design your page this is just my
personal preference just to make it easy
so inside here that's where we start
making our form so the class again this
is just styling I'm going to put form
horizontal and then for action you set
this equal to nothing because it's going
to be redirected to the same view and
that word is where it gets handled
behind the scenes now the method is
going to be equal to post and right now
what we're doing is whenever the user
adds a new album we just say hey go
ahead and paste in some URL of the album
cover but later on we're actually going
to let them upload a file so even though
we don't need this now I'm going to set
this equal to multi-part form data and
that
just making sure that we can handle
whatever files they upload in the forum
whenever we need it later on so now I
just want to add that token that
cross-site request forgery token this is
just for common security practices and
let's go ahead and think about this
so whenever Django generates these forms
for us what it does is it gives us some
pieces of information so for each model
that we generated from it's going to
give us a label which basically says
artist album title genre or logo so it
does that and another thing it does for
each one is it gives us that form field
so all of these right here are just
going to be inputs so it's pretty much
it's going to give us a huge dictionary
of labels and inputs so what we could do
is we could go through and in this form
handle each one so okay I want to make a
for group and I want to put the label to
the left and the input to the right and
then I'm gonna do it for the other one
make sure it's lined up and then do it
to the right and then later on whenever
we make another form have to do it again
and again and again and again but that
again
it breaks the number one rule of
software development never repeat
yourself
so instead the proper way to handle
these is even though you can do it the
long way if you want it's better to make
a generic form template and then just
include it so what I'm going to do right
here is even though we don't have this
file carry to get go ahead and write
include also music form templates HTML
so all this file is going to be and you
see it's highlighted in yellow says um
you didn't make this yet but we will in
just a second
this is just going to be a simple
template for how we want our labels and
the form fields to be laid out and I'm
just going to lay them out left and
right right next to each other like a
nice grid or table but you can do
whatever you want all right
so we have all the fields all the places
that the user can type in the
information so the last thing that we
need to put in here is a button what am
i clicking on take
easy bunky all right so I'll actually do
it this way so guys got a little preview
of what's to come
so the class is just a forum group and
again this is just how bootstrap stuff
and all right now I just want to make a
div in here because I need to offset it
so class small offset to that means I'm
not going to take up the first two areas
because that's generally where the label
is going to be and cold small ten so in
bootstrap you always need to fill up ten
columns so that gives me that and now
I'm just going to add a button here so
button words Smiths and it'll be submit
button and now I just need to style it
fun we had success re so I want to make
it green so that's what I did right
there all right so now we need to make
this file right here so I'm going to
right click new HTML file form template
garroted this shiz so again whenever
Django generates these forms for you
they're going to give you each field one
by one so in this model right here
they're just basically a whole bunch of
input areas but they can also be maybe a
drop-down or whenever you let the user
upload files it can be a little button
that says choose a file whatever so it
comes in list called forms and we're
just going to name each one field so for
filled in form and let me just end my
loop so I don't forget and for so now
you can loop through these and style
them however you want so for each one in
bootstrap I'm just going to put mine in
a form group and I'll just say this so
whenever they have an error like let's
say they didn't fill out the artist name
then I'm going to want that error
message to appear right above the input
so they know you know what feel
they're getting an error message on so
I'm actually going to do this copy this
and put my error message right there
now you can style this however you want
I'm just going to make it tiny in red so
span class just say a text danger which
makes it red and also small and all
right that'll be good enough all right
so the name of this is whatever you name
your object I named mine field error so
hopefully this will never even display
if they never have any errors for some
reason but now I can start making the
part that is always going to display and
the first thing is label in other words
to the left is just going to say artist
and then it's going to have an input box
then it's going to say album title for
the label and then it's going to have an
input area so let me just make this
label right now and I'll just name it
class control label and also Col small
too so this is going to be two columns
wide and now for the actual label is the
label tag so that's the actual text what
essentially the label is and now for the
actual inputs this is the easy part with
the class just write coal smell 10 and
field so this is going to be the actual
input area or drop-down or whatever so
there you go that is looking good and
alright this is looking good now the
last thing we need to do is actually add
a link to make sure that the user has
some way of getting to this form so
since we have this add album button on
every single page that is in our base
template so if we scroll down to write
here add album this is this button right
here
now we can make a link and what did we
name that album ad arranged is properly
and alright so the link for this is URL
music album ad everything should be good
to go now and check it out just refresh
this to make sure our link updates now
I'm going to go ahead and click add
album and look at that me so the cell
what I was talking about with the label
right here and this is the actual field
now just I'm going to hit submit right
now and notice that it's going to
generate an error and then this field is
required you see how it's small in a red
that is what I was referencing right
here so I needed it to appear above the
actual field so that's why I offset it
by 2 and there you go and of course you
may want to style this up looks a little
bit better you know remove these list
item decorators or decorations whatever
they're called and there you go so go
ahead and click this again and let's
actually fill this bad boy out so let me
go ahead and just get a picture what can
be my album cover how about me standing
by the lake so the artist of this album
is of course Bucky and I'll just name it
the lake genre rap of course an album
logo is that right there just some URL
of an image I'm going to hit submit and
boom look at that
so it redirects you to the details page
and remember we already plugged in by
getting the primary key of this object
and now whenever I look at albums again
I now have a new album boom roasted look
at that and of course if I want to add
another one just click this and how
awesome is that so that is the basics of
using model forms it makes it a whole
lot easier
because we didn't need to generate any
of this form HTML it does simple data
validation
and also took care of adding it to the
dead base all for us pretty sweet