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How to set a default value for a datetime column to record creation time in a migration?

...e is a sample migration: class CreatePosts < ActiveRecord::Migration[5.0] def change create_table :posts do |t| t.datetime :modified_at, default: -> { 'CURRENT_TIMESTAMP' } t.timestamps end end end See discussion at https://github.com/rails/rails/issues/27077 and an...
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What is Model in ModelAndView from Spring MVC?

... answered Feb 20 '11 at 5:20 limclimc 35.4k1919 gold badges9292 silver badges139139 bronze badges ...
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Is there a JavaScript function that can pad a string to get to a determined length?

... solution here and this is for me much much simpler: var n = 123 String("00000" + n).slice(-5); // returns 00123 ("00000" + n).slice(-5); // returns 00123 (" " + n).slice(-5); // returns " 123" (with two spaces) And here I made an extension to the string object: String.prototype.paddingLef...
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How do you truncate all tables in a database using TSQL?

... For SQL 2005, EXEC sp_MSForEachTable 'TRUNCATE TABLE ?' Couple more links for 2000 and 2005/2008.. share | improve this answe...
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nuget 'packages' element is not declared warning

...rning. To do this, create file named "packages.xsd": <?xml version="1.0" encoding="utf-8" ?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" targetNamespace="urn:packages" xmlns="urn:packages"> <xs:element name="packages"> <xs:...
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Checking if an Android application is running in the background

... 30 Answers 30 Active ...
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Find the day of a week

... 305 df = data.frame(date=c("2012-02-01", "2012-02-01", "2012-02-02")) df$day <- weekdays(as.Dat...
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Express next function, what is it really for?

... | edited Oct 30 '12 at 5:33 answered Oct 30 '12 at 5:26 ...
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Importing Maven project into Eclipse

... answered Jan 14 '10 at 1:33 Pascal ThiventPascal Thivent 524k126126 gold badges10121012 silver badges10991099 bronze badges ...
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How to set thousands separator in Java?

... 110 This should work (untested, based on JavaDoc): DecimalFormat formatter = (DecimalFormat) Number...