Is it possible to check if the previous version is: "Less than" a certain value using the context.previousVersion() field.

The documentation does a one-to-one comparison for a specific version like so:

if(context.previousVersion().compareTo(new Version(1,0)) == 0)

So could I check for versions less than 1.0?


I'm not sure about the PostInstall context, but looking at the documentation for Version.compareTo() I'd say it was possible.

Try something like:

if(context.previousVersion().compareTo(new Version(1,0)) < 0) {
    // Previous Version is Less than Version 1.0 code

Updated docs:

Return Value
Type: Integer
Returns one of the following values:

  • zero if the current package version is equal to the specified package version
  • an Integer value greater than zero if the current package version is greater than the specified package version
  • an Integer value less than zero if the current package version is less than the specified package version
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  • 1
    Your right, it's not documented, but actually that method returns a number -1 if the version is less than the version given, and a 1 if it's greater. – jordan.baucke Dec 5 '12 at 23:56
  • 2
    Late to the party, but I wanted to comment to link to the documentation, that now includes the correct return values of compareTo() : developer.salesforce.com/docs/atlas.en-us.apexcode.meta/… – David Apr 10 '17 at 21:16

You can also use major() and minor() methods in the Version object to get each part of the version number:

The version number has the format majorNumber.minorNumber.patchNumber (for example, 1.2.0)

if ((context.previousVersion().major() == 1) 
     && (context.previousVersion().minor() > 0)
     && (System.requestVersion().minor() <=9))
    // Do something for versions  between 1.1 and 1.9
else if (context.previousVersion().compareTo(new Version(2,0)) >= 0)
    // Do something completely different for versions 2.0 or greater

Source: Salesforce Version Class

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