Question

基于问题“psycopg2：使用一个查询插入多行”（psycopg2: insert multiple rows with one query）

从JS，我在服务器端接收以下内容：“2,3,4 ......”

然后，在服务器端（python 3.6）：

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context="com.example.andre.nutridian.Home"
    tools:openDrawer="start">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="@color/colorPrimary"
            android:elevation="4dp"
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />

        <FrameLayout
            android:id="@+id/fragment_container"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">

        </FrameLayout>


        <TextView
            android:layout_width="359dp"
            android:layout_height="50dp"
            android:singleLine="true"
            android:text="MENIU"
            android:textAlignment="center"
            android:textAppearance="@android:style/TextAppearance.Material.Medium"
            android:textColor="@color/colorPrimary"
            android:textSize="24sp" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:clipToPadding="false"
            android:gravity="center"
            android:orientation="horizontal">

            <android.support.v7.widget.CardView

                android:id="@+id/tabel"
                android:layout_width="160dp"
                android:layout_height="190dp"
                android:layout_margin="10dp"
                android:clickable="true"
                android:foreground="?android:attr/selectableItemBackground">

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:gravity="center"
                    android:orientation="vertical">

                    <ImageView
                        android:layout_width="64dp"
                        android:layout_height="64dp"
                        android:background="@drawable/cerclebackgroundpurple"
                        android:padding="10dp"
                        android:src="@drawable/ic_accessibility_black_24dp" />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginTop="10dp"
                        android:text="Banking"
                        android:textStyle="bold" />

                    <View
                        android:layout_width="match_parent"
                        android:layout_height="1dp"
                        android:layout_margin="10dp"
                        android:background="@color/lightgray" />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:gravity="center"
                        android:padding="5dp"
                        android:text="Raport"
                        android:textColor="@android:color/darker_gray" />


                </LinearLayout>

            </android.support.v7.widget.CardView>

            <android.support.v7.widget.CardView

                android:id="@+id/dieta"
                android:layout_width="160dp"
                android:layout_height="190dp"
                android:layout_margin="10dp"
                android:clickable="true"
                android:foreground="?android:attr/selectableItemBackground">

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:gravity="center"
                    android:orientation="vertical">

                    <ImageView
                        android:layout_width="64dp"
                        android:layout_height="64dp"
                        android:background="@drawable/cerclebackgroundpink"
                        android:padding="10dp"
                        android:src="@drawable/ic_pie_chart_outlined_black_24dp" />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginTop="10dp"
                        android:text="Ideas"
                        android:textStyle="bold" />

                    <View
                        android:layout_width="match_parent"
                        android:layout_height="1dp"
                        android:layout_margin="10dp"
                        android:background="@color/lightgray" />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:gravity="center"
                        android:padding="5dp"
                        android:text="Diete"
                        android:textColor="@android:color/darker_gray" />


                </LinearLayout>

            </android.support.v7.widget.CardView>

        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:clipToPadding="false"
            android:gravity="center"
            android:orientation="horizontal">

            <android.support.v7.widget.CardView
                android:id="@+id/calcul"
                android:layout_width="160dp"
                android:layout_height="190dp"
                android:layout_margin="10dp"
                android:clickable="true"
                android:foreground="?android:attr/selectableItemBackground">

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:gravity="center"
                    android:orientation="vertical">

                    <ImageView
                        android:layout_width="64dp"
                        android:layout_height="64dp"
                        android:background="@drawable/cerclebackgroundgreen"
                        android:padding="10dp"
                        android:src="@drawable/ic_today_black_24dp" />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginTop="10dp"
                        android:text="Add"
                        android:textStyle="bold" />

                    <View
                        android:layout_width="match_parent"
                        android:layout_height="1dp"
                        android:layout_margin="10dp"
                        android:background="@color/lightgray" />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:gravity="center"
                        android:padding="5dp"
                        android:text="Liste alimente calorii"
                        android:textColor="@android:color/darker_gray" />


                </LinearLayout>

            </android.support.v7.widget.CardView>

            <android.support.v7.widget.CardView
                android:id="@+id/statistici"
                android:layout_width="160dp"
                android:layout_height="190dp"
                android:layout_margin="10dp"
                android:clickable="true"
                android:foreground="?android:attr/selectableItemBackground">


                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:gravity="center"
                    android:orientation="vertical">

                    <ImageView
                        android:layout_width="64dp"
                        android:layout_height="64dp"
                        android:background="@drawable/cerclebackgroundyello"
                        android:padding="10dp"
                        android:src="@drawable/ic_trending_up_black_24dp" />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginTop="10dp"
                        android:text="Ideas"
                        android:textStyle="bold" />

                    <View
                        android:layout_width="match_parent"
                        android:layout_height="1dp"
                        android:layout_margin="10dp"
                        android:background="@color/lightgray" />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:gravity="center"
                        android:padding="5dp"
                        android:text="Statistici"
                        android:textColor="@android:color/darker_gray" />


                </LinearLayout>
            </android.support.v7.widget.CardView>


        </LinearLayout>
    </LinearLayout>

    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        app:headerLayout="@layout/nav_header">

    </android.support.design.widget.NavigationView>

</android.support.v4.widget.DrawerLayout>

控制台上的输出：[“（2，'截图来自2018-05-29 07-13-47.png，1'）”，“（3，'截图来自2018-05-29 07-13-47 .png，1'）“，”（4，'截图来自2018-05-29 07-13-47.png，1'）“]

错误：INSERT的表达式多于目标列

我请你指导我。如何创建正确的列表/元组并将数据插入数据库？

Answer 1

你可以这样试试吗：

list_urlquery[i] = """({}, '{}', '{}')""".format(str(list_urlquery[i]).strip(), str(file.filename).strip(), str(PATH_ID).strip())

我假设只有theid列是整数。

如果pathid也是int（数字），则尝试下面的

list_urlquery[i] = """({}, '{}', {})""".format(str(list_urlquery[i]).strip(), str(file.filename).strip(), str(PATH_ID).strip())

Answer 2

根据文档（http://initd.org/psycopg/docs/extras.html#fast-exec），它说，＆＃34; argslist - 序列序列......＆＃34;

因此，序列序列==元组列表

# creating list of tuples (sequence of sequences).
list_urlquery = urlquery_partition.strip().split(",") # list for "theid"
lst_filename = [] # list for "thefilename"
lst_pathid = [] #list for "thepathid"
lst_tpl_insertdata = [] # creating "List of Tuples == Sequence of sequences".

for i in range(len(list_urlquery)):
    lst_filename.append(str(file.filename).strip())
    lst_pathid.append(PATH_ID)

#combine all list using "zip()" for creating "List of Tuples == Sequence of sequences".
lst_tpl_insertdata = list(zip(list_urlquery,lst_filename,lst_pathid)) 

insert_query = 'INSERT INTO tbl_ma (theid, thefilename, thepathid) VALUES %s'        
psycopg2.extras.execute_values(cursor, insert_query, lst_tpl_insertdata, template=None, page_size=100)        
connection.commit()

创建用于通过一个查询插入多行的列表/元组

2 个答案: