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Wiki source code of How to Write D2W Rules

Last modified by Ravi Mendis on 2009/11/12 16:52
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Ravi Mendis 1.1 1 The quick answer is...
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3 == Use Convention Over Configuration ==
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Ravi Mendis 6.1 5 We may use [[convention over configuration>>url:http://en.wikipedia.org/wiki/Convention_over_configuration||shape="rect"]] to set up **default** D2W rules.
Ravi Mendis 1.1 6
7 In D2W, rules with a higher priority take precedence.
Ravi Mendis 6.1 8 e.g:
Ravi Mendis 1.1 9
10 {{code}}
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12 100: entity.name = 'Father' and task = 'edit' and propertyKey = 'firstName' => componentName = "D2WEditString"
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14 {{/code}}
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16 The above will override, or take precedence over the following:
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18 {{code}}
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20 75: task = 'edit' and propertyKey = 'firstName' => componentName = "D2WEditString"
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22 {{/code}}
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24 We may exploit this feature of D2W to set up a set of rules as conventions or defaults.
Ravi Mendis 6.1 25 As an example, the above rule may be set up to be a default for the editing of the key {{code language="none"}}firstName{{/code}} instead of having to define separate rules for every entity that has a {{code language="none"}}firstName{{/code}}. In other words you may define the one rule (above) instead of the following three rules:
Ravi Mendis 1.1 26
27 {{code}}
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29 100: entity.name = 'Father' and task = 'edit' and propertyKey = 'firstName' => componentName = "D2WEditString"
30 100: entity.name = 'Mother' and task = 'edit' and propertyKey = 'firstName' => componentName = "D2WEditString"
31 100: entity.name = 'Child' and task = 'edit' and propertyKey = 'firstName' => componentName = "D2WEditString"
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33 {{/code}}
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35 In this manner we can keep the number of D2W rules down to a minimum - which vastly improves maintainability.
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37 {{info title="Rule of Thumb"}}
38 Set a lower priority to generic rules.
39 {{/info}}