pymongo集合架构在字段thorough验证器架构上定义唯一索引

Question

我想知道是否有任何方法可以通过验证器模式定义唯一字段？

这是我的示例代码，我想去掉行：

db.testcollection.create_index('author', unique=True)

有什么方法可以在验证器模式中定义这个吗？

from pymongo import MongoClient, errors
from bson import ObjectId
import datetime

client = MongoClient()
db = client.testdb
coll_name = 'testcollection'
# check if collection exist and drop it
collist = db.list_collection_names()
if coll_name in collist:
col = db[coll_name]
col.drop()
print('Collection ' + coll_name + ' dropped.')
# create test collection with validator schema
collection = db.create_collection(coll_name, validator={
'$jsonSchema': {
'bsonType': 'object',
'additionalProperties': True,
'required': ['author', 'content'],
'properties': {
'author': {
'bsonType': 'string',
},
'content': {
'bsonType': 'string',
'description': 'Default text.'
}
}
}
})
# create index unique index on author field
db.testcollection.create_index('author', unique=True)
# define post data for testing
post = {'author': 'Dule Pacov',
'content': 'Best article about PyMongo.',
'tags': ['mongo', 'python', 'pymongo'],
'date': datetime.datetime.utcnow()}
# testing if duplicate key error works
i = 0
while i < 3:
i = i + 1
try:
# try insert data into collection
post_id = collection.insert_one(post).inserted_id
except errors.DuplicateKeyError:
# print error if duplicate author key was found
print('Duplicate key found.')
except Exception as e:
# print other error reasons
print(str(e))
# print data for specific ObjectId
print(collection.find_one({"_id": ObjectId(post_id)}))

Answer 1

模式验证和唯一索引是两个独立的操作。

使用create_index命令有什么问题？