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• How to handle "null primary key encountered" exception in eclipselink?

  - by den-javamaniac

  Hi. I'm catching ... Null primary key encountered in unit of work clone ... exception in eclipselink(2.0.2 with 2.0 jpa) literally meaning that id in my entity is <=0 (for primitive types). Though debug here states that everything's fine and I have nothing to worry about. My AS is glassfish v3. Can any one point out what may cause such behavior?

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• Switching OS, what will I need to copy over? (ssh key, etc)

  - by GoodGets

  I'd like to change the OS on my laptop. I currently use Windows 7, but would like to install Ubuntu, but I'm not sure exactly what I need on the new OS. I've deployed an app to Heroku, which required my ssh key, is that all I need to copy over? Or are there other files I need as well?

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• Using a '.' in your key name in MongoDB (PyMongo)

  - by user319723

  When I try saving a dict with a '.' in the key PyMongo throws an error (InvaildName) however I do see (on the Mongodb website) that keys can have '.''s in them. Why is it that pymongo won't let me save these docs? Is there an issue with them and Mongo? James

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• Why does Sql 2008 suggest I have the Primary Key Column as an Included Column in an Index

  - by Raine

  Sql 2008 is telling me to include the Primary Key in an index in the Included Column field. I thought the PK was automagically returned with all indexes?

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• How can i check if key is pressed during click event with jquery?

  - by daniel smith

  Hi, I would like to catch a click event with jquery and be able to tell if a key was pressed at the same time so i can fork within the callback function based on the keypress. for example: $("button").click(function() { if([KEYPRESSED WHILE CLICKED]) { do something... } else { do something different... } }); Does anyone know if this is possible at all or how it can be done if it is possible?

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• The explain tells that the query is awful (it doesn't use a single key) but I'm using LIMIT 1. Is th

  - by Ricardo

  The explain command with the query: explain SELECT * FROM leituras WHERE categorias_id=75 AND textos_id=190304 AND cookie='3f203349ce5ad3c67770ebc882927646' AND endereco_ip='127.0.0.1' LIMIT 1 The result: id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE leituras ALL (null) (null) (null) (null) 1022597 Using where Will it make any difference adding some keys on the table? Even that the query will always return only one row.

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• Fluent Nhibernate napping to existing database with primary key in joining table of a many to many r

  - by Todd

  I have an existing database with a many to many relationship however the joining table has a primary key ID and 2 foreign keys to do the join. Is it possible to configure the mapping files to handle this? at the moment i am stuck. Thanks

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• JavaScript: capture key press without placing an input element on the page?

  - by powerboy

  How to capture key press, e.g., Ctrl+Z, without placing an input element on the page in JavaScript? Seems that in IE, keypress and keyup events can only be bound to input elements (input boxes, textareas, etc)

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• How to iterate over an dictionary without knowing the keys, while getting key and object?

  - by dontWatchMyProfile

  I have an NSDictionary and want to iterate over the objects. But at the same time, I need to know the key of the dictionary. I remember there was a special, fancy form of fast enumeration, but have forgotten the exact syntax. Anyone?

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• How to Auto-Increment Non-Primary Key? - SQL Server

  - by user311509

  CREATE TABLE SupplierQuote ( supplierQuoteID int identity (3504,2) CONSTRAINT supquoteid_pk PRIMARY KEY, PONumber int identity (9553,20) NOT NULL . . . CONSTRAINT ponumber_uq UNIQUE(PONumber) ); The above ddl produces an error: Msg 2744, Level 16, State 2, Line 1 Multiple identity columns specified for table 'SupplierQuote'. Only one identity column per table is allowed. How can i solve it? I want PONumber to be auto-incremented.

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• Faster way to find out the key for given value from Map?

  - by Charles

  I want to find out the key for given value from HashMap, currently I have to go through all keys and check its value in map, is there a faster way?

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• How can I check if a Resource Bundle contains a specific key in a JSF page.

  - by Silverfox

  I have a JSF page which has a bundle loaded. However I need to dynamiclly build a key to access the property. What I need to do is check that the property exists so I can decide whether to render the or not. I have tried checking if the value is empty but it always renders the output. Thanks

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• Is it correct to represent a foreign key on a conceptual data model?

  - by Zach

  Is it correct to represent a foreign key on a conceptual data model, or should I only introduce foreign keys when I am doing the relational model?

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• How can I use a Perl hash key that has a literal dot?

  - by imerez

  I have a hash in Perl which has been dumped into from some legacy code the name of the key has now changed from simply reqHdrs to reqHdrs.bla $rec->{reqHdrs.bla} My problem is now I cant seem to access this field from the hash any ideas? The following is my error Download Script Output: Bareword "reqHdrs" not allowed while "strict subs" in use

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• How do you send a key command using an NSTimer to a hidden application?

  - by Magician Software

  I am trying to write an app for Toontown that will send the "end" key when the application is minimized or hidden. How do I do this. I cant figure it out Thanks

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• How to reassign a missing shortcut key to a new one?

  - by Raghu

  Hi All, Previously Ctrl + D was assigned to an application by a shortcut on Desktop. The shortcut is now deleted but shortcut key is still assigned to the same application. I need to reassign Ctrl + D to a new application. Regards and Thanks,

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• Why does SQL Server 2008 suggest I have the primary key column as an included column in an index

  - by Raine

  SQL Server 2008 is telling me to include the Primary Key in an index in the Included Column field. I thought the PK was automagically returned with all indexes?

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• How do you fix a MySQL "Incorrect key file" error when you can't repair the table?

  - by Wayne M

  I'm trying to run a rather large query that is supposed to run nightly to populate a table. I'm getting an error saying Incorrect key file for table '/var/tmp/#sql_201e_0.MYI'; try to repair it but the storage engine I'm using (whatever the default is, I guess?) doesn't support repairing tables. how do I fix this so I can run the query?

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• Can I set ignore_dup_key on for a primary key?

  - by Mr. Flibble

  I have a two-column primary key on a table. I have attempted to alter it to set the ignore_dup_key to on with this command: ALTER INDEX PK_mypk on MyTable SET (IGNORE_DUP_KEY = ON); But I get this error: Cannot use index option ignore_dup_key to alter index 'PK_mypk' as it enforces a primary or unique constraint. How else should I set IGNORE_DUP_KEY to on?

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• Easiest way to get Enum in to Key Value pair.

  - by vijay.shad

  Hi, I have defined my Enums like this. public enum UserType { RESELLER("Reseller"), SERVICE_MANAGER("Manager"), HOST("Host"); private String name; private UserType(String name) { this.name = name; } public String getName() { return name; } } What should be the easiest way to get a key-value pair form the enum values?

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• how can I do something before current activity go background by Back key?

  - by backspace7

  When back key is pressed, current activity goes background. I'd like to show a popup and let user choose really close this activity, before current activity go background. I tried to override onStop(), but it's called after activity goes back. Please somebody explains me how to do that?

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• Is there a standard way to run a x509 key server?

  - by chotchki

  Does anyone know of a project / product that has standardized how to access/download x509/SSL certificates over HTTP? I have seen RFC 4387 but haven't found anyone who implements it. Basically, I am trying to setup a key server for an internal application. So short of implementing my own, does anyone have any suggestions?

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• SQL Server: Deleting Rows with Foreign Key Constraints: Can Transactions override the constraints?

  - by Mark Redman

  I have a few tables where Foreign Key constraints are added. These are used with code generation to set up specific joins in generated stored procedures. Is it possible to override these constraints by calling multiple deletes within a transaction, specifically "TransactionScope" in C# or is cascaded deleting absolutely required?

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• Are there special key events in Windows I can't handle?

  - by Orit

  Are there any key events I cannot handle in my C# program? For example, can I implement differently Windows's events: Ctrl+Alt+Del, Alt+Tab, WindowsKey+D, etc.

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• (Database Design) why in the database tables most of the times primery key name is: <tablename_id> a

  - by meyosef

  Hi, why in the database tables most of the times primery key name is: tablename_id and not id? example: user_id and not just id. Thanks

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