大约有 414 项符合查询结果（耗时：0.0417秒） [XML]
What is the proper way to check for existence of variable in an EJS template (using ExpressJS)?
...een 2 collections together with mongoose's populate(), in this case admins.user_id existed but was related to an inexistant users._id.
So, couldn't find why:
if ( typeof users.user_id.name == 'undefined' ) ...
was failing with "Cannot read property 'name' of null"
Then I noticed that I needed to ...
Get Specific Columns Using “With()” Function in Laravel Eloquent
...
User::with(array('post'=>function($query){
$query->select('id','user_id');
}))->get();
Don't forget to include the foreign key (assuming it is user_id in this example) to resolve the relationship, otherwise you'll get zero results for your relation.
...
Postgresql query between date ranges
...ecome simpler if you use >= start AND < end.
For example:
SELECT
user_id
FROM
user_logs
WHERE
login_date >= '2014-02-01'
AND login_date < '2014-03-01'
In this case you still need to calculate the start date of the month you need, but that should be straight forward in an...
How do I handle too long index names in a Ruby on Rails ActiveRecord migration?
...
Provide the :name option to add_index, e.g.:
add_index :studies,
["user_id", "university_id", "subject_name_id", "subject_type_id"],
:unique => true,
:name => 'my_index'
If using the :index option on references in a create_table block, it takes the same options hash as add_index...
AngularJS passing data to $http.get request
...ams.
$http({
url: user.details_path,
method: "GET",
params: {user_id: user.id}
});
See: http://docs.angularjs.org/api/ng.$http#get and https://docs.angularjs.org/api/ng/service/$http#usage (shows the params param)
...
How can I change the table names when using ASP.NET Identity?
...ers" you can also change the field names the default Id column will become User_Id.
modelBuilder.Entity<IdentityUser>()
.ToTable("Users", "dbo").Property(p => p.Id).HasColumnName("User_Id");
or simply the below if you want to keep all the standard column names:
model...
PostgreSQL Autoincrement
...any other integer data type, such as smallint.
Example :
CREATE SEQUENCE user_id_seq;
CREATE TABLE user (
user_id smallint NOT NULL DEFAULT nextval('user_id_seq')
);
ALTER SEQUENCE user_id_seq OWNED BY user.user_id;
Better to use your own data type, rather than user serial data type.
...
无法打包成apk - App应用开发 - 清泛IT社区，为创新赋能！
本帖最后由 wlf2201 于 2025-03-02 11:20 编辑
打包apk时候，出现服务器故障，无法保存文件，请稍候重试
程序写的比较大，几乎没有图片，500k稍微多点，新建立一个只有几个元件的小项目，可以顺利打包，怀疑时程序过大导致...
Joining three tables using MySQL
...
SELECT *
FROM user u
JOIN user_clockits uc ON u.user_id=uc.user_id
JOIN clockits cl ON cl.clockits_id=uc.clockits_id
WHERE user_id = 158
share
|
improve this answer
...
Index on multiple columns in Ruby on Rails
... its columns in sequence starting at the beginning. i.e. if you index on [:user_id, :article_id], you can perform a fast query on user_id or user_id AND article_id, but NOT on article_id.
Your migration add_index line should look something like this:
add_index :user_views, [:user_id, :article_id...