Postgres-CRUD-SQLAlchemy-and-Alembic

CLI CRUD is done in the main.py file.

• Uses a PostgreSQL.
• Uses Alembic for easy migrations.
• With sqlalchemy ORM, models for the DB were made.
• seed.py fills the database with the fake data (using Faker). Now by using models.
• my_select.py performs a series of queries using models. Queries are the same as were here: https://github.com/AusAura/PureSQL-sqlite3

Usage:

Run the script in the CLI with selected operation and additional parameters

Examples:

• py main.py -o list -m Student
• py main.py -o create -m Group -a REVO_DRINKERS
• py main.py -o delete -m Group -a 4
• py main.py -o create -m Subject -a 'Mortilogy',1
• py main.py -o update -m Subject -a 8,'Morti logy',2
• py main.py -o delete -m Subject -a 8

Arguments:

• "-o", "--operation": (required=True) What to do? (create, list, update, remove)
• "-m", "--model": Select the model.
• "-a", "--arguments": Pass the set of arguments via comma (,).

Required arguments for passing during each of the operations for each model:

1. 'create'

• 'Student': 'name_uq,group_id'
• 'Group': 'name_uq'
• 'Tutor': 'name_uq'
• 'Subject': 'name_uq,tutor_id_fk',
• 'Mark': 'mark_value,student_id_fk,subject_id_fk,date'

2. 'list'

• 'Student': ''
• 'Group': ''
• 'Tutor': ''
• 'Subject': ''
• 'Mark': ''

3. 'update'

• 'Student': 'id,name_uq,group_id'
• 'Group': 'id,name_uq',
• 'Tutor': 'id,name_uq',
• 'Subject': 'id,name_uq,tutor_id_fk',
• 'Mark': 'id,mark_value,student_id_fk,subject_id_fk,date'

4. 'delete'

• 'Student': 'id'
• 'Group': 'id'
• 'Tutor': 'id'
• 'Subject': 'id'
• 'Mark': 'id'