Ant Design upload listtype = “picture card” realizes multi image upload and click preview image encapsulation

Users can upload pictures and display thumbnails in the list. When the number of photos uploaded reaches the limit, the upload button disappears. Click on the picture to open the picture preview box. Introduce the component where it is used, and the component will return the image array after transferring the image.

import React, {
    useState, useEffect } from 'react';
import {
    Upload, Modal } from 'antd';
import {
    PlusOutlined } fro

Solution to page scroll bar failure caused by opening secondary spring frame in Ant Design modal form

Ant Design modal form encountered the problem of page scroll bar failure after opening the secondary pop-up box and closing the two pop-up boxes.

Reason:
when the modal form pop-up box is opened, it will add style = "width: Calc (100% - 15px) to the body label; overflow: hidden;” inline style to hide the scroll bar of the page. When closed, this style will be cleared to restore the scroll bar. Open a secondary modal form pop-up box in the modal form pop-up box. After closing the two pop-up boxes, there will be a problem that the style on the body label is not cleaned up, resulting in the problem that the page scroll bar is not restored.

The solution is as follows:
after the first level cartridge modal form is closed, clean up the style added to the body. The specific code is as follows:

<ModalForm
     modalProps={{
         afterClose: () => {
             if (document.getElementsByTagName('body')[0].hasAttribute('style')) {
                 document.getElementsByTagName('body')[0].removeAttribute('style');
             }
         },
     }}>
</ModalForm>

ModuleNotFoundError: No module named ‘mmcv._ext

Problem: when installing mmdetection, mmcv is often installed, module not founderror: no module named ‘mmcv_ The problem of ext ‘pip install mmcv

use:

pip install mmcv-full

If you have any strange problems, please use the version of mmcv that matches your environment, such as:

pip install mmcv-full==latest+torch1.5.0+cu101 -f https://openmmlab.oss-accelerate.aliyuncs.com/mmcv/dist/index.html

For the specific version, please refer to the GitHub description of mmcv. The link is as follows:

https://github.com/open-mmlab/mmcv

ValueError: num_samples should be a positive integer value, but got num_samp=0

I encountered some problems while debugging the code on baseline. At that time, I reported an error and couldn’t find the reason repeatedly. Later, inspired by the following blog, I finally solved the problem. I will summarize this problem again

https://blog.csdn.net/xnmc2014/article/details/85557384

The problem may be the following: pay attention to the parameters when calling dataloder

self.train_dataloader = DataLoader(train_dataset, batch_size=TrainOption.train_batch_size, shuffle=TRUE, num_workers=TrainOption.data_load_worker_num)

The parameter setting of shuffle is wrong, because there is already a batch_ Sample, there is no need to shuffle for random sample, so shuffle here should be set to false.

com.mysql.cj.exceptions.NumberOutrange

Com.mysql.cj.exceptions.numberoutofrange: value ‘13873421234’ is outside of valid range for type Java. Lang.integer
the database is bigint
this error first check whether the XML configuration is wrong
select id = name “resulttype = entity class
check whether the type of entity class is wrong
java passes long

Caused by: java.sql.SQLException: Parameter index out of range (1 ＞ number of parameters, which is 0

1、 Error analysis

It can be seen from the error prompt that the actual parameters passed in are larger than the parameters to be set in SQL, that is, the parameters in SQL?Less than parameter or?There is no
cause at all

？ The number is surrounded by single quotation marks

For example:

sql += " and article_title like '%#{articleTitle}%'";

2、 Solutions

Remove single quotes

The above SQL is changed to:

sql += " and article_title like concat('%',#{articleTitle},'%')";

Connection error:Cannot connect to redis-server. Details are available in connection log.

The redis process has not started, and the following situation occurs

reloads the configuration, and the directory does not use the absolute path to restart. My redis is installed in the pagoda
redis.conf in the/www/server/redis directory

redis server in the/www/server/redis/SRC directory

Restart profile

/www/server/redis/src/redis-server /www/server/redis/redis.conf

Profile validation

Android Studio Series: after Android studio is opened, the project window will not be displayed.

My android studio version is 4.0.2. Today, I double-click the Android studio icon, and suddenly the project window will not be displayed.

Open the environment variable and create a new user variable JDK_ Home , the value is the installation path of JDK. Create a new user variable instead of a new system variable. System variables need to be restarted to be valid.