大约有 471 项符合查询结果（耗时：0.0146秒） [XML]
sqlalchemy: how to join several tables by one query?
...om"
).all()
One note about that...
query.join(Address, User.id==Address.user_id) # explicit condition
query.join(User.addresses) # specify relationship from left to right
query.join(Address, User.addresses) # same, with explicit target
query.join('addresses') ...
How to convert JSON to CSV format and store in a variable
...,description,link,timestamp,image,embed,language,user,user_image,user_link,user_id,geo,source,favicon,type,domain,id
"Apple iPhone 4S Sale Cancelled in Beijing Amid Chaos (Design You Trust)","Advertise here with BSA Apple cancelled its scheduled sale of iPhone 4S in one of its stores in China’s ca...
Naming of ID columns in database tables
...
Kevin, same as you. for example: user_id, role_id for PKey, and role_user_id for FKey. It is good on a large scale project. Because if all ID field are named to "id", it is too confuse. But i think it is personal preference, somebody think only use "id" are ...
Sequelize.js: how to use migrations and sync
...
email: 'bob@bob.com'
.success (user) ->
console.log 'added user'
user_id = user.id
myTable = [
field1: 'womp'
field2: 'rat'
subModel: [
field1: 'womp'
,
field1: 'rat'
]
]
Remember to take your sync() out of index in your models or it will overwrite w...
What's the difference between identifying and non-identifying relationships?
... @Eugene, yes I would expect that to be a non-identifying relationship. user_id should be the primary key by itself, and updated_by is not part of a multi-column primary key.
– Bill Karwin
Jul 29 '11 at 14:18
...
Rails: Default sort order for a rails model?
...7 separate queries.
You can use a passed in parameter such as a date or a user_id (something that will change at run-time and so will need that 'lazy evaluation', with a lambda, like this:
scope :recent_books, lambda
{ |since_when| where("created_at >= ?", since_when) }
# Note the `where` ...
Is there a way to use SVG as content in a pseudo element :before or :after
...029%2C-2%2056%2C6%2027%2C8%2043%2C17%2043%2C17%2014%2C6%2016%2C7%2041%2C16%2025%2C9%2069%2C15%20120%2C11%2051%2C-3%20126%2C-22%20181%2C-32%2054%2C-9%20105%2C-20%20148%2C-23%2042%2C-3%2071%2C1%20104%2C6%2034%2C4%2065%2C14%2098%2C22%22%2F%3E%0A%3C%2Fsvg%3E%0A);
}
<div class="author_">Lord Byr...
REST API 404: Bad URI, or Missing Resource?
...uggest to the user that they reformat their URI to look like /restapi/user/USER_ID
– nategood
Apr 5 '12 at 16:35
...
How to drop columns by name in a data frame
... null_assign(dtest, drop_vec) 74.593 83.0585 86.2025 94.0035 1476.150
subset(dtest, select = !names(dtest) %in% drop_vec) 106.280 115.4810 120.3435 131.4665 65133.780
subset(dtest, select = names(dtest)[!names(dtest) %in% drop_vec]) 108.611 119.4830 124.0...
Foreign Key to multiple tables
...ject varchar(50) NULL
)
CREATE TABLE dbo.Owner
(
ID int NOT NULL,
User_ID int NULL,
Group_ID int NULL,
{{AdditionalEntity_ID}} int NOT NULL
)
With this solution, you would continue to add new columns as you add new entities to the database and you would delete and recreate the fo...