Support procs for required_if; add present_if#115
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March 20, 2015 11:33
These were supported in AttributeResolver, but not in Attribute itself. The proc will receive one argument, which is the loaded object. Signed-off-by: Sean McGivern <sean.mcgivern@rightscale.com>
When dumping a model, each attribute will be replaced with nil if it has a present_if condition and that condition is not met. The allowed conditions are the same as for required_if: * A string key, which passes if that key's value is not nil. * A one-item hash, whose key is the path in the object, and whose value is any ===-compatible object (string, regex, proc, etc.). * A proc, which is passed the object. Like required_if, this cannot be used in conjunction with the required option. It can be used with the required_if option, but it should only be so in a way that they are compatible (for instance, if both have the same condition, then the attribute will only be present when it is required). Signed-off-by: Sean McGivern <sean.mcgivern@rightscale.com>
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@blanquer are you interested in either of these? |
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This is an experimental PR with two separate changes:
required_ifcan now be a proc itself. Previously it could be a proc, but only with a key as part of a hash condition:required_if: {key => proc}. Now it can just berequired_if: proc, where the proc gets access to more than one attribute at a time.present_ifwill make an attribute of a modelnilwhen dumping if it's set and the condition evaluates to false. We need this, or something like it, because we want to express a two-way constraint for some of ourrequired_ifattributes: this is always required if it's present, and never present if it's not required.