[英]Python - Saving and Recovering Image/Pictures/JPEG from PostgreSQL
So, I'm trying to save an image into my PostgreSQL table in Python using psycopg2所以,我正在尝试使用 psycopg2 在 Python 中将图像保存到我的 PostgreSQL 表中
INSERT Query (Insert.py)插入查询 (Insert.py)
#Folder/Picture is my path/ID is generated/IDnum is increment
picopen = open("Folder/Picture."+str(ID)+"."+str(IDnum)+".jpg", 'rb').read()
filename = ("Picture."+str(ID)+"."+str(IDnum)+".jpg")
#Sample file name is this Picture.1116578795.7.jpg
#upload_name is where I want the file name, upload_content is where I store the image
SQL = "INSERT INTO tbl_upload (upload_name, upload_content) VALUES (%s, %s)"
data = (filename, psycopg2.Binary(picopen))
cur.execute(SQL, data)
conn.commit()
now to recover the saved Image I perform this query (recovery.py)现在要恢复保存的图像,我执行此查询 (recovery.py)
cur.execute("SELECT upload_content, upload_name from tbl_upload")
for row in cur:
mypic = cur.fetchone()
open('Folder/'+row[1], 'wb').write(str(mypic[0]))
now what happens is when I execute the recovery.py it does generate a ".jpg" file but I can't view or open it.现在发生的情况是,当我执行 recovery.py 时,它确实生成了一个“.jpg”文件,但我无法查看或打开它。
If it helps I'm doing it using Python 2.7 and Centos7.如果有帮助,我将使用 Python 2.7 和 Centos7。 for the sake of additional information, I get this on the image viewer when I open the generated file.为了提供更多信息,当我打开生成的文件时,我会在图像查看器上看到它。
Error interpreting JPEG image file (Not a JPEG file: starts with 0x5c 0x78)
I also tried using other formats as well (.png, .bmp)我也尝试使用其他格式(.png、.bmp)
I double checked my database type and apparently upload_content datatype is text its supposed to be bytea I thought I already had it set to bytea when I created my db.我仔细检查了我的数据库类型,显然upload_content 数据类型是文本,它应该是bytea我以为我在创建数据库时已经将它设置为 bytea。 Problem solved.问题解决了。
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