feat: expands Knex query coverage on models

[willviles]

The following PR extends the coverage of Knex query methods available to Lux models.

whereRaw

http://knexjs.org/#Builder-whereRaw

• Implemented
• Tests written

Enables the user to build their own where queries. A prime example of the added flexibility this enables is building a scope for fuzzy text searching on columns:

search(request) {
  const whereRaw = Object.keys(request.params.search)
    .reduce(([query, bindings], key, i) => {
      return [
        query += `${i === 0 ? '' : 'AND'} "${key}" LIKE ?`,
        [...bindings, `%${request.params.search[key]}%`]
      ];
    }, ['', []]);

  const [query, bindings] = whereRaw;
  return this.whereRaw(query, bindings);
}

whereBetween / whereNotBetween

http://knexjs.org/#Builder-whereBetween
http://knexjs.org/#Builder-whereNotBetween

• Implemented
• Tests written

whereBetween and whereNotBetween are implemented in the same object format as where({}):

Model.whereBetween({
  one: [1, 5],
  two: [1, 5]
});
=> WHERE "model"."one" BETWEEN 1 AND 5 AND "model"."two" BETWEEN 1 AND 5

whereNull / whereNotNull

http://knexjs.org/#Builder-whereNull
http://knexjs.org/#Builder-whereNotNull

• Implemented
• Tests written

whereNull is a slight adjustment to the .where({}) query. It simply turns null values into whereNull or whereNotNull snapshots.

[codecov]

Codecov Report

Merging #691 into master will increase coverage by 0.06%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #691      +/-   ##
==========================================
+ Coverage   92.38%   92.44%   +0.06%     
==========================================
  Files         180      180              
  Lines        1996     2012      +16     
==========================================
+ Hits         1844     1860      +16     
  Misses        152      152

Impacted Files	Coverage Δ
src/packages/database/model/index.js	100% <100%> (ø)	⬆️
src/packages/database/query/index.js	94.59% <100%> (+0.56%)	⬆️

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[zacharygolba]

👏 Awesome work!