Missing weight parameter in function score query for certain functions #356
Description
Hi,
I am using version 7.2.1 of your library and I have just noticed that I cannot add weight attribute when I am adding field value factor function. Is this intentional? I can see $weight parameter in ONGR\ElasticsearchDSL\Query\Compound\FunctionScoreQuery::addDecayFunction method.
Methods
ONGR\ElasticsearchDSL\Query\Compound\FunctionScoreQuery::addFieldValueFactorFunctionONGR\ElasticsearchDSL\Query\Compound\FunctionScoreQuery::addRandomFunctionONGR\ElasticsearchDSL\Query\Compound\FunctionScoreQuery::addScriptScoreFunction
on the other hand do not have this parameter.
As far as I know, you can add weight to any function supported by function score query, see documentation
Because scores can be on different scales (for example, between 0 and 1 for decay functions but arbitrary for field_value_factor) and also because sometimes a different impact of functions on the score is desirable, the score of each function can be adjusted with a user defined weight. The weight can be defined per function in the functions array (example above) and is multiplied with the score computed by the respective function.
I have also noticed that there is method ONGR\ElasticsearchDSL\Query\Compound\FunctionScoreQuery::addSimpleFunction, is this the way I should use to add weight?