Before you begin, make sure that the homework management project you created is working well. If you’re sure, let’s get started!
Daftar Isi
Create a CRUD subcategory
As usual, open the terminal and execute the following code:
$ rails g scaffold sub_category name:string category_id:integer
$ rake db:migrate
By running this code, we created CRUD for sub_category and migrated it to the database.
The next step we add validation and relationships to the model subcategory :
After adding validation and relationships in the model subcategorywe also need to add relationships in the model category :
- Add this method to the top of sub_categories_controller:
- Add the following method to the sub_categories_controller private section:
Edit sub_category views
We first modify the file app/views/sub_categories/_form.html.erb become :
We also modify the file app/views/sub_categories/show.html.erb become :
And above all, we change the file app/views/sub_categories/index.html.erb become :
By modifying these three files, we continue by trying to fill in the data for the subcategory. Run the following code:
| Halaman Show subcategory |
If you save the data successfully, your browser will display:
| Halaman Show subcategory |
Subcategory data added
To make the implementation of creating this drop-down list more understandable, we need to add a lot of data subcategory. Add the following subcategory data based on each category:
After finishing adding the existing data to the image, we can also add other sub_category data as per our wish.
Editing CRUD Assignments
Before changing the script in CRUD assignments, we first add attributes sub_category_id in the assignment structure by running the following code in the terminal.
$ rails g migration AddSubCategoryIdToHomework
Open the migration file in the folder database/migrateand add the following script:
Perform the migration by running the following code in the terminal:
We create a new relationship in the model homeworkby adding the following script:
Then we change the controller duty_controller look like the following:
Then we continue by changing the script app/views/homeworks/index.html.erb become :
And we also change the script on it app/views/homeworks/show.html.erb become :
After editing the index and viewing the assignments. We therefore continue by changing the existing script app/views/homeworks/_form.html.erb become :
so congratulations!! You have successfully created a subcategory drop-down list
PakarPBN
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The purpose of a PBN is to give the impression that the target website is naturally earning links from multiple independent sources. If done effectively, this can temporarily improve keyword rankings, increase organic visibility, and drive more traffic from search results.