keys

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Am trying to setup a postgresql table that has two foreign keys that point to the same primary key in another table. When I run the script I get the error sqlalchemy.exc.AmbiguousForeignKeysError: Could not determine join condition between parent/child tables on relationship Company.stakeholder - there are multiple foreign key paths linking the tables. Specify the 'foreign_keys' argument, providing a list of those columns which should be counted as containing a foreign key reference to the parent table. That is the exact error in the

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am using Redis to store some information and detect changes in that information over time (for example, think users and locations). What is the value to using a longer or shorter keyname? Using a longer key is clearer, but is there much cost for memory or performance to using longer keyname? Here are examples: SET L:123456 " ..." HSET U:987654321 loc 123456 time or SET loc:{123456} " ..." HSET user:{U987654321} loc 123456 time 回答1: It all depends on how you are going to use it. If every byte counts, for example when you have to pay for

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have set up my new server with Google Compute Engine. I added a user and their public key into the metadata in the Google Cloud console ( sshKeys ). I attempted to replace a public key in the metadata, but now the old one seems to be the only one able to ssh into my server (using PuTTY). The new one doesn't seem to be updated. Now, even if I remove the whole metadata or type gibberish text into the sshKeys field, it will still work! Could it be that it will require sometime for the metadata to be pushed to the server (my previous attempts

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm trying to use the Hudson Gerrit Trigger plug-in. For whatever reason, Gerrit is not accepting the SSH key located at /var/lib/hudson/.ssh/id_rsa . In the GUI I get Connection error : com.jcraft.jsch.JSchException: Auth fail as an error, and when I'm working in the terminal I get a Permission denied (publickey) error. How can I generate and use a working private key so Hudson and Gerrit can play nice? 回答1: The OP Josh Smith managed to sort it out: I'd actually needed to add the SSH key from /var/lib/hudson/.ssh/id_rsa.pub for the user (me

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: Just for curiosity (I know it can be a single line foreach statement), is there some PHP array function (or a combination of many) that given an array like: Array ( [ 0 ] => stdClass Object ( [ id ] => 12 [ name ] => Lorem [ email ] => lorem@example . org ) [ 1 ] => stdClass Object ( [ id ] => 34 [ name ] => Ipsum [ email ] => ipsum@example . org ) ) And, given 'id' and 'name' , produces something like: Array ( [ 12 ] => Lorem [ 34 ] => Ipsum ) I use this pattern a lot, and I noticed that array_map is quite useless in this scenario

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have 3 models: User, Program, UserProgram. UserProgram is an actual model of its own. Here are how the models look in the database: users id programs id user_programs user_id program_id I would like to have in my Program model: function users() { return $this->hasManyThrough('App\User','App\UserProgram'); } But this does not work. How can I make this relationship work? 回答1: hasManyThrough is not used for this purpose. You need a many-to-many relationship. class Users { public function programs() { return $this->belongsToMany('App\Program',

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I have a dictionary like below, var dataSource : [ String : String ] = [ "FirstName" : "Austin" , "ListName" : "Michael" , "Address" : "Street Address" , "City" : "Chennai" ] I want to populate these values in a UITableView , so I tried to get all the keys from Dictionary to an Array like below, let dataArray = Array ( dataSource . keys ) I got the output as [String] like, [ "LastName" , "FirstName" , "City" , "Address" ] The problem is, the order of the keys has changed, I want the array in the same order as dictionary has. Can

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: We plan to import OLTP Relational tables into AWS Redshift. The CustomerTransaction table joins to multiple lookup tables. I only included 3, but we have more. What should Sort Key be on Customer Transaction Table? In regular SQL server, we have nonclustered indexes on the foreign keys in CustomerTransaction table. For AWS Redshift, Should I use compound sort keys or interleaved sort on foreign key columns in CustomerTransaction? What is the best indexing strategy for this table design. Thanks, create table.dbo CustomerTransaction {

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I would like to capture keyevents in my little app. What I have done: class ViewController : NSViewController { ... override func keyDown(theEvent: NSEvent) { if theEvent.keyCode == 124 { println("abc") } else { println("abcd") } } override var acceptsFirstResponder: Bool { return true } override func becomeFirstResponder() -> Bool { return true } override func resignFirstResponder() -> Bool { return true } ... } What happens: When a key pressed, the Funk sound effect plays. I've seen many posts talking about how this is a delegate the

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: In my MySQL database, there is a table which has 2,000,000 records. Now, I would like to insert another 6,000,000 new records into this table. To speed up the insertion, I though I should use disable/enable keys like following: ALTER TABLE cars DISABLE KEYS; INSERT INTO cars ... ... ... INSERT INTO cars ... ALTER TABLE search_all_values ENABLE KEYS; OPTIMIZE TABLE cars; But I somehow feel that, the disable/enable keys would make more sense to be used for empty table insertion. While in my case, I have already 2,000,000 records in the table,