Django Tutorial #1 - Introduction — Transcript

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1. 0:00hello and welcome to the first video
2. 0:02tutorial of this D Jango web framework
3. 0:04course for beginners my name is Amir
4. 0:06from be brace Channel and I will be your
5. 0:08instructor for the upcoming videos
6. 0:10throughout this course we will delve
7. 0:12into various aspects of D Jango starting
8. 0:14from the basics and gradually
9. 0:16progressing towards more advanced topics
10. 0:18and at the end of the course we're going
11. 0:20to build a real life application like
12. 0:22this one an inventory management system
13. 0:25this final project will give you
14. 0:27hands-on experience with Jango where
15. 0:29we're going to use use function-based
16. 0:30views and Implement clean and simple
17. 0:33Styles our inventory management system
18. 0:36will enable you to add products where
19. 0:38you can enter the name of the product
20. 0:40the stock keeping unit the price the
21. 0:44quantity and of course the supplier once
22. 0:46you're done from adding the product you
23. 0:48can save that product and now you can
24. 0:50have a list of the products saved on
25. 0:52your website you have your product ID
26. 0:55the name the SKU the price the quenti
27. 0:57the supplier and the actions where you
28. 0:59can actually update your product or if
29. 1:01you want to delete it all together you
30. 1:03can do that as well and you will be
31. 1:05redirected to a confirmation message
32. 1:07asking you if you want to delete this
33. 1:09product if you're hesitant you can click
34. 1:11on cancel you can go to the inventory
35. 1:13app where you have your homepage you can
36. 1:16display all of your products and again
37. 1:19you can delete the product that you
38. 1:20don't want this project is going to help
39. 1:23you consolidate everything that you're
40. 1:24going to learn in this course and see
41. 1:26how it all comes together in a practical
42. 1:29application and I just want to take a
43. 1:30moment here to express my gratitude to
44. 1:32net Ninja for giving me the incredible
45. 1:34opportunity to become a host content
46. 1:37creator it's a great pleasure indeed to
47. 1:39be part of such an amazing team and I'm
48. 1:41excited to bring you engaging and
49. 1:42entertaining
50. 1:44content now let's move to the
51. 1:46prerequisites before diving into D Jango
52. 1:49it's essential to have a good
53. 1:51understanding of python so if you
54. 1:53consider yourself an intermediate python
55. 1:55programmer you'll find it easier to
56. 1:57follow along with Jango additionally
57. 1:59familiar with HTML and CSS is going to
58. 2:02be very beneficial and even if you don't
59. 2:04know python that's no problem at all
60. 2:06because net ninja got you covered net
61. 2:09ninja has a lot of Great Courses for
62. 2:11python as well as HTML and CSS crash
63. 2:15courses and in this first part I'm going
64. 2:18to cover three main questions what is D
65. 2:20Jango why is D Jango and what is mvt
66. 2:25architecture so the first question is
67. 2:27what is D Jango Jango is a p based web
68. 2:30framework designed for Rapid development
69. 2:32of efficient web applications it is
70. 2:35often referred to as batteries included
71. 2:38framework because it provides built-in
72. 2:40features for various aspects of web
73. 2:42development these features include the
74. 2:45Django admin interface default database
75. 2:47management system which is SQL light 3
76. 2:50and many others streamlining the
77. 2:52development process okay that's great
78. 2:54and all but why using D Jango why not
79. 2:57using any other web framework the first
80. 3:00reason is rapid development D Jango
81. 3:02enables the creation of fully-fledged
82. 3:04web applications in a short time
83. 3:07database flexibility while SQL light 3
84. 3:10is the default database D jangu allows
85. 3:13easy switching to other databases like
86. 3:16psql or SQL Alchemy for example also you
87. 3:20have built-in admin interface and this
88. 3:22indeed simplifies administrative tasks
89. 3:25related to website management and don't
90. 3:28worry we're going to see all of that in
91. 3:30practice and the last reason is
92. 3:32extensive ecosystem so jeno has a vast
93. 3:36collection of additional packages that
94. 3:38are available for extended functionality
95. 3:41which is if you think about it very
96. 3:43handy for Rapid development so D Jango
97. 3:46follows the model view template
98. 3:49architecture mvt separates the logic of
99. 3:52your application into three different
100. 3:54components so the first component is the
101. 3:57model if we're going to respect the VT
102. 4:00order put by D Jango so the model in
103. 4:03Django represents the data structure of
104. 4:05your application it's your database
105. 4:07essentially it defines the schema of
106. 4:10your database tables and encapsulates
107. 4:12the logic for interacting with the
108. 4:14database now let's move to view a view
109. 4:17simply is a python function or class
110. 4:20that receives HTTP requests and returns
111. 4:23HTTP responses so views are responsible
112. 4:26for processing the incoming requests
113. 4:29interacting with the database through
114. 4:30models and preparing data to be rendered
115. 4:33in a
116. 4:34response and finally the template
117. 4:37templates in Jango or HTML files that
118. 4:39contain the structure of your
119. 4:41application's user interface essentially
120. 4:44and templates can include Place holders
121. 4:46and template tags which are replaced
122. 4:48with Dynamic content when rendered by D
123. 4:50Jango D Jango uses the D Jango template
124. 4:53language it's very similar to Ginger 2
125. 4:55in flask for example okay now you've
126. 4:58been introduced to the components of the
127. 5:00mvt architecture let's see how it works
128. 5:03so this is a diagram that shows you how
129. 5:06the mvt actually works first of all the
130. 5:09user interacts with the Jango
131. 5:11application by sending HTTP requests to
132. 5:14specific URLs these requests can be for
133. 5:17various actions such as viewing a page
134. 5:19submitting a form or performing some
135. 5:22other operation and here comes the role
136. 5:24of the view function or class which
137. 5:27processes the request interacts with the
138. 5:29database and prepares data to be
139. 5:32rendered in the response so when the
140. 5:34view interacts with the model to fetch
141. 5:36data from the database it does so by
142. 5:38using D jango's omm or object relational
143. 5:42mapping an OM simply allows you to
144. 5:45interact with database using python
145. 5:48objects so instead of writing SQL
146. 5:50queries directly you define your
147. 5:52database structure using the python
148. 5:55classes C models so instead of writing
149. 5:58SQL queries directly you define your
150. 6:00database structure using python classes
151. 6:03which are models these models represent
152. 6:05database tables and each attribute of
153. 6:08the model class corresponds to a column
154. 6:11in that table don't worry we're going to
155. 6:13see that when we're going to practice
156. 6:15the interaction between the view and the
157. 6:17model not only for retrieving data but
158. 6:20it also could be for creating updating
159. 6:22or deleting records as needed so after
160. 6:25processing the request and interacting
161. 6:27with the database The View PRS data to
162. 6:30be rendered in a response as you can see
163. 6:32this data is typically passed to a
164. 6:34template using the Django template
165. 6:36language as I mentioned earlier the
166. 6:38Django template language uses template
167. 6:41tags and placeholders to dynamically
168. 6:43generate HTML content and finally The
169. 6:46View returns an HTTP response containing
170. 6:48the HTML content generated by the
171. 6:51template this response is sent back to
172. 6:53the user's browser which then renders
173. 6:56the page and displays it to the user I
174. 6:59understand that everything might seem
175. 7:00theoretical for now but once we dive
176. 7:02deeper into D Jango and start practicing
177. 7:05everything will begin to make sense and
178. 7:07fall into place in the next video we're
179. 7:09going to set up our environment install
180. 7:11D Jango and create our first D Jango
181. 7:14project