Created
September 19, 2018 07:23
add fullOuterJoin support to realm-query
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RealmQuery.prototype.fullOuterJoin = function(query) { | |
const initialCriteria = this.criteria.slice(); | |
// NOTE: We don't use arrow function because if the criteria of another RealmQuery is joined | |
// NOTE: we want 'this' instance to be used for the call such that values are pushed on to the correct instance. | |
if (initialCriteria.length) { | |
const q1 = function() { | |
return `(${initialCriteria | |
.map(wrapper => { | |
if (Array.isArray(wrapper)) { | |
return `(${wrapper | |
.map(_w => { | |
return _w.call(this); | |
}) | |
.join(" ")})`; | |
} | |
return wrapper.call(this); | |
}) | |
.join(" AND ")})`; | |
}; | |
const q2 = function() { | |
return `(${query.criteria | |
.map(wrapper => { | |
if (Array.isArray(wrapper)) { | |
return `(${wrapper | |
.map(_w => { | |
return _w.call(this); | |
}) | |
.join(" ")})`; | |
} | |
return wrapper.call(this); | |
}) | |
.join(" AND ")})`; | |
}; | |
const result = function() { | |
return [q1, q2] | |
.map(wrapper => { | |
return wrapper.call(this); | |
}) | |
.join(" OR "); | |
}; | |
this.criteria = [result]; | |
} else { | |
this.criteria = query.criteria.slice(); | |
} | |
return this; | |
}; |
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