大约有 43,000 项符合查询结果（耗时：0.0491秒） [XML]
Select DISTINCT individual columns in django?
...ary, NOT an instance of ProductOrder.
Second, it would be a good idea to read the warning note in the docs about using distinct(). The above example will work but all combinations of distinct() and values() may not.
PS: it is a good idea to use lower case names for fields in a model. In your cas...
What's an Aggregate Root?
...
@Ahmad, other aggregates might refer to LineItems as read-only data, they just can't change them. If other aggregates could change them, you couldn't protect the order's invariants (nor the line items').
– Jeff Sternal
Mar 8 '10 at 19:57
...
MySQL pagination without double-querying?
...d therefore you don't need to do another query with COUNT(*) because you already know what it's going to say. You have all the information you need to show pagination. If you are having a problem with pagination not showing to the user then you have a bug somewhere else.
– th...
How do I run a spring boot executable jar in a Production environment?
...
You always have to give your service user permissions to read and execute the jar file. You also have to configure the default Java for the server and Java environment variables to make things work.
– micaro
May 25 '19 at 11:38
...
ng-model for `` (with directive DEMO)
...
I created a workaround with directive:
.directive("fileread", [function () {
return {
scope: {
fileread: "="
},
link: function (scope, element, attributes) {
element.bind("change", function (changeEvent) {
var re...
How do I execute a Git command without being in the repository?
...
local [] Desktop: mkdir git
local [] Desktop: cd git
local [] git: touch README.txt
local [] git: git init
Initialized empty Git repository in /Users/albert/Desktop/git/.git/
local [] git: cd ..
local [] Desktop: git --work-tree=git --git-dir=git/.git add .
local [] Desktop: git --work-tree=git --...
Conda: Installing / upgrading directly from github
...env create referred to force, and not for conda create, my mistake for not reading carefully.
– Will
Nov 21 '18 at 22:35
|
show 4 more comme...
List of encodings that Node.js supports
I need to read a file which is encoded with ISO-8859-1 (also called latin1), something like this:
2 Answers
...
Why does writeObject throw java.io.NotSerializableException and how do I fix it?
...rd party class into your own class, which implements Serializable and uses readObject() and writeObject() to manually serialize the data of the third party class. In some cases this might be a reasonable approach. stackoverflow.com/a/12963580/1208581
– sulai
Ma...
How can I add a table of contents to a Jupyter / JupyterLab notebook?
...
JupyterLab ToC instructions
There are already many good answers to this question,
but they often require tweaks to work properly with notebooks in JupyterLab.
I wrote this answer to detail the possible ways of including a ToC
in a notebook while working in and expo...