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Here are several features I'd like to suggest. after using liquibase for awhile
1. User friendly messages for failed preconditions.
I'd like to have a way to specify a message for each precondition, which will
be shown to user in case of precondition failure.
For example, if I defined a precondition
Code:
<preConditions>
<dbms type="oracle" />
<dbms type="mysql" />
</preConditions>
I'd like to add a message that only Oracle and MySQL are supported, like this
Code:
<preConditions message="only Oracle and MySQL are supported">
<dbms type="oracle" />
<dbms type="mysql" />
</preConditions>
2. PropertyDefinedPrecondition
Liquibase allows to use properties in a from ${propertyName}. Properties are
defined in command line or somewhere else.
Undefined property can lead to unexpected behaviour, which is hard to analyse.
I'd like to have a way to check that property is actually defined before using
it. I think the best way is to define a new precondition check, so the
following would be possible:
Code:
<preConditions onFail="MARK_RUN">
<and>
<propertyDefined name="myTable" failureType="error"/>
<not><tableExists name="${myTable}"/></not>
</and>
</preConditions>
<createTable name="${myTable}">
...
The failure type specifies the precondition result - failure or error.
For now I resolved this problem with implementing custom precondition.
3. Hooks for GUI.
I'd like to create some GUI around Liquibase tool and I'd like it to have some
progress bar.
So I need some hooks (or a way to supply observers/listeners) to get the
current status of the operation.
4. Please, include documentation about Liquibase tags into distribution bundle.
It is not convinient to read the docs from site, especially via slow
connections.
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Regards,
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