Question

windows 7

python 2.7

Django 1.11

我已经使用Django开发了一个网站。在后端，我有带2个表的sqlite数据库。一个表接受用户提交的表单，另一个用于比较。用户提交表单A后，它将保存在表catalog_fw下，并将catalog_fw.ODM和catalog_fw.project_name与表catalog_fw_instance中的表进行比较。如果一行的catalog_fw.ODM和catalog_fw.project的内容完全相同，则catalog_fw_instance.level将与A组合以传递到.exe以生成txtx文件。

但是，此行发生错误：c.execute("catalog_fw_instance.level,...... ` 当我运行此python文件时：

sqlite3.OperationalError: near "catalog_fw_instance": syntax error

获取sqlite数据，进行比较并传递给.exe的代码在这里：

def when_call_exe():
with sqlite3.connect('db.sqlite3') as con:
    c = con.cursor()

    #c.execute("catalog_fw_instance.level, SELECT catalog_fw.ODM_name, catalog_fw.project_name, catalog_fw.UAP, catalog_fw.NAP, catalog_fw.LAP, catalog_fw.num_address FROM catalog_fw INNER JOIN catalog_fw_instance ON catalog_fw.ODM_name=catalog_fw_instance.ODM_name AND catalog_fw.project_name=catalog_fw_instance.project_name")
    sql = ("SELECT catalog_fw.ODM_name, catalog_fw.project_name, catalog_fw.UAP, catalog_fw.NAP, catalog_fw.LAP, " +
           "catalog_fw.num_address, catalog_fw_instance.level " +
           "FROM catalog_fw catalog_fw" +
           "INNER JOIN catalog_fw_instance catalog_fw_instanc" +
           "    ON catalog_fw.ODM_name = catalog_fwi.ODM_name AND catalog_fw.project_name = catalog_fw_instance.project_name")
    c.execute(sql)



    print '1:', c.fetchone()
    parameter = c.fetchone()
    print '2', parameter

    #pass to exe
    args = ['.//exe//Test.exe', parameter[0], parameter[1]+parameter[2], parameter[3], parameter[4], parameter[5], parameter[6]]

    output = my_check_output(args)
    if 'SUCCESS' in output:
        filename = output[28:-1]

    else:
        filename = output[8:-1]

    downloadlink = os.path.join('/exe', '%s' % filename)


    #save link to sqlite db

    c.execute('''UPDATE catalog_fw SET download = %s  WHERE 
ODM_Name=parameter[1] AND project_Name=parameter[2] ''' % downloadlink)

此处显示sqlite数据库中的2个表

table 1 table 2

Answer 1

据我所知，在Python中调用cursor#execute()时，我们应该传递包含要运行查询的单个字符串。看起来您正在传递选择参数之一，然后是查询，所有这些都作为单个字符串一起传递。考虑以下版本：

c = con.cursor()

sql = ("SELECT cf.ODM_name, cf.project_name, cf.UAP, cf.NAP, cf.LAP, " +
       "cf.num_address, cfi.level " +
       "FROM catalog_fw cf " +
       "INNER JOIN catalog_fw_instance cfi " +
       "    ON cf.ODM_name = cfi.ODM_name AND cf.project_name = cfi.project_name")
c.execute(sql)

print(c.fetchone())
parameter = c.fetchone()

sqlite3.OperationalError：“ ........”附近：语法错误

1 个答案: