[英]Importing JSON Object into Postgresql using Python
我正在尝试使用Python将JSON数据导入Postgresql但是,当我在我创建的JSONB数据类型中放入“via”字段时,我得到“psycopg2.ProgrammingError:无法调整类型'dict'”错误Postgresql数据库中的表。 有什么方法可以解决我的问题吗? 任何帮助都可以。
sample.json
[
{
"url": "https://www.abcd.com/",
"id": 123456789,
"external_id": null,
"via": {
"channel": "email",
"id": 4,
"source": {
"from": {
"address": "abc@abc.com",
"name": "abc def"
},
"rel": null,
"to": {
"address": "def@def.com",
"name": "def"
}
}
}
},
{
"url": "http://wxyz.com/",
"id": 987654321,
"external_id": null,
"via": {
"channel": "email",
"id": 4,
"source": {
"from": {
"address": "xyz@xyz.com",
"name": "uvw xyz"
},
"rel": null,
"to": {
"address": "zxc@zxc.com",
"name": "zxc"
}
}
}
}
]
my_code.py
import json
import psycopg2
connection = psycopg2.connect("host=localhost dbname=sample user=gerald password=1234")
cursor = connection.cursor()
data = []
with open('sample.json') as f:
for line in f:
data.append(json.loads(line))
fields = [
'url', #varchar
'id', #BigInt
'external_id', #BigInt Nullable
'via' #JSONB
]
for item in data:
my_data = [item[field] for field in fields]
insert_query = "INSERT INTO crm VALUES (%s, %s, %s, %s)"
cursor.execute(insert_query, tuple(my_data))
一种解决方案是在插入db之前转储dict:
for item in data:
my_data = [item[field] for field in fields]
for i, v in enumerate(my_data):
if isinstance(v, dict):
my_data[i] = json.dumps(v)
insert_query = "INSERT INTO crm VALUES (%s, %s, %s, %s)"
cursor.execute(insert_query, tuple(my_data))
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