csv 在mariaDB上使用pandas在单个for循环中插入具有多对多关系的两个表

ngynwnxp  于 2023-09-28  发布在  其他
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我尝试将数据批量插入到两个具有多对多关系的表中,如果我在单个表上插入数据,则没有问题,但我无法同时插入两个表。

CREATE TABLE IF NOT EXISTS `mydbv3`.`PRODOTTI` (
  `idPRODOTTI` INT(11) NOT NULL AUTO_INCREMENT,
  `PROD_ATTIVO` TINYINT(4) NULL DEFAULT 1,
  `EAN13` VARCHAR(45) NOT NULL,
  `prod_nome` VARCHAR(300) NOT NULL,
  `Prezzo` DECIMAL(15,2) NULL DEFAULT NULL,
  `Costo` DECIMAL(15,2) NOT NULL,
  `PRODOTTI_marca` VARCHAR(45) NULL DEFAULT NULL,
  `Quantita` DECIMAL(10,0) NOT NULL DEFAULT 0,
  `PRODOTTI_descrizione` TEXT NULL DEFAULT NULL,
  `Data_ins` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP() ON UPDATE CURRENT_TIMESTAMP(),
  `Data_update` TIMESTAMP NULL DEFAULT NULL,
  `CheckProd` TIMESTAMP NULL DEFAULT NULL,
  `Fornitori_Ordini_idOrdini` INT(11) NULL DEFAULT NULL,
  `Fornitori_idFornitori` INT(11) NOT NULL,
  `CAT_IVA_idCAT_IVA` INT(11) NOT NULL,
  PRIMARY KEY (`idPRODOTTI`),
  UNIQUE INDEX `idPRODOTTI_UNIQUE` (`idPRODOTTI` ASC) VISIBLE,
  INDEX `fk_PRODOTTI_Fornitori1_idx` (`Fornitori_idFornitori` ASC) VISIBLE,
  INDEX `fk_PRODOTTI_CAT_IVA1_idx` (`CAT_IVA_idCAT_IVA` ASC) VISIBLE,
  CONSTRAINT `fk_PRODOTTI_CAT_IVA1`
    FOREIGN KEY (`CAT_IVA_idCAT_IVA`)
    REFERENCES `mydbv3`.`CAT_IVA` (`idCAT_IVA`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `fk_PRODOTTI_Fornitori1`
    FOREIGN KEY (`Fornitori_idFornitori`)
    REFERENCES `mydbv3`.`Fornitori` (`idFornitori`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB
AUTO_INCREMENT = 145908
DEFAULT CHARACTER SET = utf8;

CREATE TABLE IF NOT EXISTS `mydbv3`.`CATEGORIE` (
  `idCATEGORIE` INT(11) NOT NULL AUTO_INCREMENT,
  `Nome_Categoria` VARCHAR(45) NOT NULL,
  `Categoria_Padre` VARCHAR(45) NOT NULL,
  PRIMARY KEY (`idCATEGORIE`))
ENGINE = InnoDB
AUTO_INCREMENT = 31
DEFAULT CHARACTER SET = utf8;

这是我试过的代码

import pandas as pd
import mysql.connector as msql
from mysql.connector import Error

empdata = pd.read_csv('static/files/prod_ridotto3.csv', index_col=False, delimiter=';', on_bad_lines='skip', usecols=["Attivo (0/1)","EAN13","Nome","Categorie","Prezzo","IVAID","Costo","Fornitore","Quantità","Data Ordine"])
#print(empdata.head())
#cat = series_one = pd.Series(empdata.Age)
#EANDATA = pd.read_csv('static/files/prod_ridotto3.csv', delimiter=';', on_bad_lines='skip', usecols=["Categorie"])
#print (EANDATA)
#print(EANDATA.head())

try:
    conn = msql.connect(host='192.168.1.2', database='mydbv3', user='root', password='password')
    try:
        if conn.is_connected():
            cursor = conn.cursor()
            cursor.execute("select database();")
            record = cursor.fetchone()
            #print (record)
            print("You're connected to database: ", record)
            #loop through the data frame
            for i,row in empdata.iterrows():
                sql = "INSERT INTO PRODOTTI (PROD_ATTIVO,EAN13,prod_nome,Prezzo,CAT_IVA_idCAT_IVA,Costo,Fornitori_idFornitori,Quantita,Data_ins) \
                VALUES (%s,%s,%s,%s,(select idCAT_IVA from CAT_IVA where CAT_IVA_code = %s),%s, \
                (select idFornitori from Fornitori where FORNITORI_Nome = %s),%s,%s)"
                #print (type(row))
                #print(row)
                #print(tuple(row))
                cat = (row.Categorie,)
                #print("Type CAT",type(cat))
                #print("CAT=",cat)
                #print (type(tuple(cat)))
                sql1 = "INSERT INTO PRODOTTI_has_CATEGORIE (PRODOTTI_idPRODOTTI,CATEGORIE_idCATEGORIE) VALUES ((SELECT LAST_INSERT_ID()),(select CATEGORIE.idCATEGORIE from CATEGORIE where Nome_Categoria = %s))"
                cursor = conn.cursor()
                cursor.execute("select database();")
                record = cursor.fetchone()
                print (record)
                #print(sql)
                #print(tuple(row))
                #print(row)
                cursor.execute(sql, tuple(row))
                cursor.execute(sql1, cat)
                print("Product inserted",i)
                conn.commit()
    except Error as e:
        print("Error while inserting in DB", e)
except Error as e:
    print("Error while connecting to MySQL", e)

现在,显然我得到了错误:AttributeError: 'Series' object has no attribute 'Categorie'但是如果我在

usecols=["Attivo (0/1)","EAN13","Nome","Categorie","Prezzo","IVAID","Costo","Fornitore","Quantità","Data Ordine"])

thenb我在第一次插入中没有使用它,并得到一个错误,与没有使用所有字段的事实有关。
我想一定有一个简单的解决方案,或者我的DB结构有一些问题。我已经尝试了很多不同的方法,但没有成功,cabn有人帮助这个问题?
谢谢

js81xvg6

js81xvg61#

如果我正确理解了下面这行:

cat = (row.Categorie,)

创建具有单个值的元组。稍后使用此语句,您将提供一个单值元组,

cursor.execute(sql1, cat)

但实际上你应该提供更多因此,您需要查看这一行并提供sql1需要的所有值。
希望有帮助。

oipij1gg

oipij1gg2#

谢谢Michel,我已经用这段代码解决了我问题(我希望它能帮助其他人):

for i,row in empdata.iterrows():

        valprod = (row[0], row[1], row[2], row[4], row[5], row[6], row[7], row[8], row[9])
        valcat = (row[3],)

        sql = "INSERT INTO PRODOTTI (PROD_ATTIVO,EAN13,prod_nome,Prezzo,CAT_IVA_idCAT_IVA,Costo,Fornitori_idFornitori,Quantita,Data_ins) \
        VALUES (%s,%s,%s,%s,(select idCAT_IVA from CAT_IVA where CAT_IVA_code = %s),%s, \
        (select idFornitori from Fornitori where FORNITORI_Nome = %s),%s,%s)"

        sql1 = "INSERT INTO PRODOTTI_has_CATEGORIE (PRODOTTI_idPRODOTTI,CATEGORIE_idCATEGORIE) VALUES \
        ((SELECT LAST_INSERT_ID()),(select CATEGORIE.idCATEGORIE from CATEGORIE where Nome_Categoria = %s))"

        cursor = conn.cursor()
        cursor.execute("select database();")
        record = cursor.fetchone()

        try:
            cursor.execute(sql, valprod)
            print ("Inserito prodotto:",i)
        except Error as e:
            print("Errore inserimento prodotto:", e)
            ep = ep +1
        conn.commit()

        try:
            cursor.execute(sql1, valcat)
            print("Inserita categoria  prodotto:", i)
        except Error as e:
            print("Errore inserimento categoria:", e)
            ec = ec + 1
        conn.commit()

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