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How do you discover model attributes in Rails?
...ructure:
ActiveRecord::Schema.define(version: 20130712162401) do
create_table "users", force: true do |t|
t.string "email", default: "", null: false
t.string "encrypted_password", default: "", null: false
t.string "reset_password_token"
t.datetime "reset...
@Basic(optional = false) vs @Column(nullable = false) in JPA
...on raised before SQL is sent
to the database otherwise when using
'updatable=false' 'optional'
violations would never be reported.
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Django-Admin: CharField as TextArea
...ill usually be autoset to 250 characters, so you will want to run an ALTER TABLE to change the length in you MySQL DB, so that you can take advantage of the new larger Textarea that you have in you Admin Django site.
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Conversion of a datetime2 data type to a datetime data type results out-of-range value
I've got a datatable with 5 columns, where a row is being filled with data then saved to the database via a transaction.
26...
Difference between Python datetime vs time modules
...t need the time of a particular record - like lets say you have a seperate table/file for the transactions for each day, then you would just need the time.
However the time datatype is usually used to store the time difference between 2 points of time.
This can also be done using datetime, but if ...
Why should I declare a virtual destructor for an abstract class in C++?
...t a virtual destructor.
You will eventually end up with no virtual method table, and end up signalling your clients your intention on making it non-deleteable through a pointer to it, so you have indeed reason not to declare it virtual in those cases.
[See item 4 in this article: http://www.gotw....
Is there any difference between a GUID and a UUID?
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The binary encoding table embedded in the answer is very useful. Tnx
– Luciano
Mar 3 '16 at 18:37
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How do I run a Ruby file in a Rails environment?
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If you make the script executable by running chmod +x script.rb, you can add #!/usr/bin/env rails runner to the top of the script, and then simply run it with ./script.rb.
– stwr667
Sep 16 at 6:30
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Azure SQL Database Bacpac Local Restore
... build upon the previous point, the mechanism is buggy - I've had multiple tables failing to transfer because the tool could not detect a unique key
– David Airapetyan
Mar 13 '12 at 21:19
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Redis - Connect to Remote Server
...stening where you expect, check your config file just to be sure.
After establishing it is listening where you expect it to, from a remote node which should have access try:
redis-cli -h REMOTE.HOST ping
You could also try that from the local host but use the IP you expect it to be listening on ...