django-orm- inquiry Basic Operations

summary

Query Format

模型类.objects.filter(字段__查询词=值）

The following describes the operation of the query words

View query set sql statement

查询集.query

Specifically, iexact

Equal to the query

Find multi-party, the wording of the conditions

I. multi foreign key table associated name is not defined

一方类名.objects.filter(多方类名小写__多方字段__查询词=值)

Case 2, the multi-table foreign key value associated with the name of a righteous write a related_query_name

一方类名.objects.filter(多方外键related_query_name的值__多方字段__查询词=值)

contains，icontains

Include Search

in

Find members

gt, lt, gte, lte

Compare Find

startswith, istartswith

Find the starting point

date, year etc.

Find a date

If the value of the date type datetime

If an int year equivalent

isnull

Sentenced empty

Boolean value

regex, iregex

Regular expression search

Detail

exact

Find exactly equivalent to equal

模型类.objects.filter(字段__exact=值）

• Explanation
  
• example

data sheet

Exact Match

result

• Case sensitivity when extended inquiry
  
  • linux case sensitive utf8_bin, where 2
  • windows are not sensitive

View sql statement

Describes how to view sql statement

查询集 = 模型类.objects.filter(查询条件）
查询集.query

• Explanation
  

• example

Inquire

result

iexact

The effect is equivalent exact, but it's fuzzy search

• Explanation
  

• example

result

• Supplement, like with =

name = 'John Doe'

versus

name like 'John Doe'

Slightly different

exact difference with iexact

contains 与 icontains

Query contains

With i indicates ignore case

• Explanation

• example

result

• And contains the exact difference

in

member

• Explanation

• example
  

• Example, find the id of the article 123 of classification

Test table

analysis

Now that classification to find
to find the classification table
here is to find relevance

Note
here the query
is
based on the classification, the article reverse lookup (foreign key in the article)

View to find
multi-row objects. Party class name in lowercase _set.all () to get all

Find query in
the multi-class name .objects.filter (party like the one name __ __ query term field = value)

In this way, search

Conditions reverse lookup

Multi-party find two ways to search

• Find common

多方类名.objects.filter(一方类名小写__一方字段__查询词=值)

Model class like this

This is the reverse lookup

notes

• If a foreign key is added a defined related_query_name

多方类名.objects.filter(一方类名外键related_query_name的值__一方字段__查询词=值)

Red frame reverse lookup table party

If on one side than the table id, you can not write __id

• All categories examples of what a pile of books
  

gt, lt, gte, lte

Greater than, less than, greater than or equal, less than or equal

• Explanation
  

• example
  

startswith, istartswith

To a certain start

• example

• summary
  

date, year

Time related types

• example

Extraction 2018. Article 4.4 is released

check sentence

Corresponding sql

日期字段_date = 日期时间对象

• 例子，year, month day week_day

Filtration time range

isnull

Sentenced to null

• Example, to find all the data empty date

Bool value is

• notes

Let me be

Regular expression search

• example

• notes

Cross-table query