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Spring Boot java.sql.SQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails

I've been getting this error and having a difficult time solving this issue. The decent amount of stackoverflow questions ... here is an image of the tables in my docker container...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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vue路由守卫报错 Error: Redirected * to * via a navigation guard.

// router.ts const routes: Array<RouteConfig> = [ {path: '/', redirect: {name: 'Home'}}, {path: '/home', name ... when going from "/home" to "/dashboard" via a navigation guard....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Can't connect to Mysql server via Python (Error 111)

I've recently started learning python and coming from PHP I thought a great way to do so would be transforming ... Datos") else: print(err) accountingCursor = accountingDb.cursor()...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Change size of image in reStructuredText substitution references

I am writing a reStructuredText document with a lot of images that I reuse in different parts of the document but with different ... here |IMG_1|. Note that I am not using Sphinx....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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regex - JavaScript - Remove strange characters from string

How do I remove these strange characters from a string? I have been trying with regex, but with no success. Before Remove: RegExr was created by ... {N}|p{S}|p{M}p{P}])/gu /[WD]/g...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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JavaScript/ES6如何简写这段switch代码

numberTree: [ 10000000000000, 18900, 15700, 12500, 9300, 7700, 6100, 4500, 3700, 2900, 2100, 1700, 1300, 900, 700, 500 ... me.Total >= this.numberTree[15]: this.treenum = 4; break;...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - not able to launch dash (jupyter-notebook-python)

C:UsersadminAnaconda3libsite-packagessklearnutilsvalidation.py:595: DataConversionWarning: Data with input dtype object was converted to float64 ... ', or Ctrl-D.", stacklevel=1)...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - TypeError: Cannot interpret '4' as a data type

I am trying to learn Neural Network. Following is the code. I am getting the error 'TypeError: Cannot ... forward(inputs) layer2.forward(layer1.output) print(layer2.output)...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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表格里的值如何回显到modal中

这是一个表格,当我点击编辑的时候,会弹出一个modal 点击编辑的时候回获取当前行数据,这两个数据一样的,怎么回显都modal中? 一个一个的写代码太冗余了...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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excel - Find if any of a list of substrings is present in a string

My problem is that I have a long list of titles that need to be categorised based on keywords. There are 10 categories, that each ... cat 2 etc. How to foo the bar Wax on, wax off...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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serialization - ONNX a OneVsRest with CatBoost estimator

I made a OneVsRest classifier, that uses a CatBoost as estimator. I'd like to serialize the whole model. I tried ... hybrid model. Did anyone manage to do this before? Thanks!...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to store data from web scraping poject

#Background I am currently playing with some web scraping project as I am learning python. I have a project which scrapes ... I would try making my own DB. Thanks for your ideas...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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为什么有node-sass的项目在编译机每次编译出来的jshash值不一样呢

为什么有node-sass的项目在编译机每次编译出来的jshash值不一样呢...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - How to change the Provider name in Huawei AppGallery?

I uploaded an app to Huawei AppGallery. In about section of the app there are two fields called Developer & Provider. I was ... it didn't work for me. Can anyone help me please?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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155 views

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css - Consistent approach for styling React components

Just recently I have begun working with React, and to some extent front-end development. I am using ... React applications? Is using multiple styling techniques recommended?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Getting Django - [Errno 111] Connection refused error

when Im trying to verify user registration via email its showing [Errno 111] Connection refused error in production ... members/register/ [Errno 111] Connection refused please help...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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vue2.6.12源码调试报错

小白求大神指点，vue 源码调试按照网上的教程修改 package.json: "dev": "rollup -w -c scripts/config.js --environment TARGET:web-full-dev -- ... index.html出现错误查看vue.js 这些参数全是undefined vue版本为2.6.12...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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rabbitmq - Could not load module C:Program Fileserl-23.1erts-11.1inerlexec.dll

Post Rabbit MQ Upgrade, Rabbit MQ service is not coming up on startup. The error message that shows up is : ... .dll. Failed to set Global Policy message-TTL on rabbit@HOSTNAME...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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amcharts - How to set polygon.nonScaling on Orthographic projection?

While setting nonScaling for 2D series is well described in the docs, setting this property to true on an amCharts ... website. How to set nonScalling for those red markers?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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495 views

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Declaring a variable as hex in Python

I have a variable s=64 This variable is in hex. But Python takes it as decimal. How do I declare it as a hex variable? I ... s=0x64 But I have only s=64 How can I go about this?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - ERROR TypeError: Cannot read property 'nativeElement' of undefined after modal popup loading in angular

i have a component with modal popup and defined a viewchild elementRef to try to get an element of input text ... this.customerParams = new CustomerParams(); this.getCustomers(); }...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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根据对象里面某个值做判断，当有id重复的时候，当前对象覆盖之前的对象

let obj = { column:{ __id:'1', align: "center" className: "test-name" key: "singlePrice", .... }, index: 0 row:{ applyNum: 1 ... 获取了第二个obj2的时候，里面column.__id是一样的，怎么样判断让obj2覆盖obj的呢...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - How to set PrefetchCount when using ConnectReceiveEndpoint with MassTransit?

As default, MassTransit sets the PrefetchCount to 16. I would like to change that. I can do this when configuring MassTransit. But ... (2))); }); }); await hostHandler.Ready; }...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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399 views

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ide - IntelliJ add one line to multiple files

I need to add a single text line at the end of many configuration files (txt-like format). The line is identical for all files. ... command to do it once for all? I can't find it....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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arrays - Symfony 5 - How manipulate a serialized object in JSON

I want serialize an object for get a JSON. When i serialize this object, i get this: { "id": 1, "title": "Title" ... in $authors. How can i manipulate a JSON format like i want ?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Make tensor out of a vector and find contractions which gives scalar

Assume there is a random 3D vector (U). We can construct a tensor of rank K by following outer product Tk = U @ ... since we can always multiply by T0 and still have an scalar....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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MySQL8.0如何创建存储过程(create procedure)

以下代码报错 # MySQL 8.0.21 # Workbench 8.0.21 select * FROM products; CREATE PROCEDURE fn () BEGIN select prod_id FROM ... server version for the right syntax to use near '' at line 4...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Apache NiFi custom SQL script

I have a following SQL script in Java application: INSERT INTO web.ga_report (metric_value, account_login,metric_name, ... how to apply SQL script above to Apache NiFi?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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