How to use thinkorm to quickly filter and sort data

How to use ThinkORM to quickly implement data filtering and sorting

Introduction:
With the continuous increase of data, quickly finding the required data has become an important task in development. ThinkORM is a powerful and easy-to-use ORM (Object Relational Mapping) tool that can help us quickly filter and sort data. This article describes how to use ThinkORM to filter and sort data, and provides code examples.

1. Install ThinkORM:
First, we need to install ThinkORM. Execute the following command in the command line:

pip install think-orm

2. Connect to the database:
Before starting to use ThinkORM, we need to connect to the database first. Import ThinkORM in the code and create a database connection:

from thinkorm import Database

db = Database('mysql', host='localhost', port=3306, user='root', password='password', database='test_db')

The above code uses the MySQL database as an example, you can choose other types of databases according to the actual situation.

3. Define the model:
Next, we need to define the model to map the tables in the database. Suppose we have a table named User, containing three fields: id, name, and age. We can create a User class to represent the table:

from thinkorm import Model, Field

class User(Model):
    id = Field(primary_key=True)
    name = Field()
    age = Field()

The above code defines a User class and uses Field to define it fields in the table.

4. Data filtering:
Using ThinkORM, we can easily implement data filtering. Suppose we want to query users who are older than 18 years old, we can use the following code:

users = db.query(User).filter(User.age > 18).all()

The above code uses the filter() method to implement data filtering, and its parameter is a conditional expression, That is, filter conditions.

5. Data sorting:
In addition to data filtering, ThinkORM also supports data sorting. Suppose we want to sort the user list in ascending order of age, we can use the following code:

users = db.query(User).order_by(User.age).all()

The above code uses the order_by() method to implement data sorting, and its parameter is the sorting field.

6. Comprehensive application:
Of course, we can also combine data filtering and sorting. The following is a sample code for a comprehensive application:

users = db.query(User).filter(User.age > 18).order_by(User.age).all()

The above code will first filter out users older than 18 years old, and then sort them in ascending order of age.

Summary:
This article introduces how to use ThinkORM to quickly filter and sort data. First, we need to install and connect ThinkORM. Then, define the model to map the tables in the database. Then, we can use the filter() method to filter data and the order_by() method to sort data. Finally, we can combine data filtering and sorting. I hope this article will be helpful to you when using ThinkORM for data processing.

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