Peewee - Sorting

It is possible to select records from a table using order_by clause along with models select() method. Additionally, by attaching desc() to the field attribute on which sorting is to be performed, records will be collected in descending order.

Example - Displaying Records in Ascending Order

Following code display records from contact table in ascending order of City names.

main.py

from peewee import *

db = SqliteDatabase('mydatabase.db')

class BaseModel(Model):
   class Meta:
      database = db

class Contacts(BaseModel):
   RollNo = IntegerField()
   Name = TextField()
   City = TextField()

class Branches(BaseModel):
   RollNo = IntegerField()
   Faculty = TextField()
   
rows=Contacts.select().order_by(Contacts.City)
print ("Contact list in order of city")
for row in rows:
   print ("RollNo:{} Name: {} City:{}".format(row.RollNo,row.Name, row.City))
   
db.close()

Output

Here is the sorted list which is arranged according to ascending order of city name.

Contact list in order of city
RollNo:107 Name: Beena City:Chennai
RollNo:102 Name: Amar City:Delhi
RollNo:108 Name: John City:Delhi
RollNo:103 Name: Raam City:Indore
RollNo:101 Name: Anil City:Mumbai
RollNo:106 Name: Hema City:Nagpur
RollNo:104 Name: Leena City:Nasik
RollNo:109 Name: Jaya City:Nasik
RollNo:110 Name: Raja City:Nasik
RollNo:105 Name: Keshav City:Pune

Example - Displaying Records in Descending Order

Following code displays list in descending order of Name field.

main.py

from peewee import *

db = SqliteDatabase('mydatabase.db')

class BaseModel(Model):
   class Meta:
      database = db

class Contacts(BaseModel):
   RollNo = IntegerField()
   Name = TextField()
   City = TextField()

class Branches(BaseModel):
   RollNo = IntegerField()
   Faculty = TextField()

rows=Contacts.select().order_by(Contacts.Name.desc())
print ("Contact list in descending order of Name")
for row in rows:
   print ("RollNo:{} Name: {} City:{}".format(row.RollNo,row.Name, row.City))
  
db.close()

Output

The output is as follows −

Contact list in descending order of Name
RollNo:110 Name: Raja City:Nasik
RollNo:103 Name: Raam City:Indore
RollNo:104 Name: Leena City:Nasik
RollNo:105 Name: Keshav City:Pune
RollNo:108 Name: John City:Delhi
RollNo:109 Name: Jaya City:Nasik
RollNo:106 Name: Hema City:Nagpur
RollNo:107 Name: Beena City:Chennai
RollNo:101 Name: Anil City:Mumbai
RollNo:102 Name: Amar City:Delhi