80 lines
2.0 KiB
JavaScript
80 lines
2.0 KiB
JavaScript
'use strict';
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/*!
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* ignore
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*/
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module.exports = applyQueryMiddleware;
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const validOps = require('./validOps');
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/*!
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* ignore
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*/
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applyQueryMiddleware.middlewareFunctions = validOps.concat([
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'validate'
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]);
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/**
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* Apply query middleware
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*
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* @param {Query} Query constructor
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* @param {Model} model
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* @api private
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*/
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function applyQueryMiddleware(Query, model) {
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const kareemOptions = {
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useErrorHandlers: true,
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numCallbackParams: 1,
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nullResultByDefault: true
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};
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const middleware = model.hooks.filter(hook => {
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const contexts = _getContexts(hook);
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if (hook.name === 'updateOne') {
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return contexts.query == null || !!contexts.query;
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}
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if (hook.name === 'deleteOne') {
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return !!contexts.query || Object.keys(contexts).length === 0;
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}
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if (hook.name === 'validate' || hook.name === 'remove') {
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return !!contexts.query;
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}
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if (hook.query != null || hook.document != null) {
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return !!hook.query;
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}
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return true;
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});
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// `update()` thunk has a different name because `_update` was already taken
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Query.prototype._execUpdate = middleware.createWrapper('update',
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Query.prototype._execUpdate, null, kareemOptions);
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// `distinct()` thunk has a different name because `_distinct` was already taken
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Query.prototype.__distinct = middleware.createWrapper('distinct',
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Query.prototype.__distinct, null, kareemOptions);
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// `validate()` doesn't have a thunk because it doesn't execute a query.
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Query.prototype.validate = middleware.createWrapper('validate',
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Query.prototype.validate, null, kareemOptions);
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applyQueryMiddleware.middlewareFunctions.
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filter(v => v !== 'update' && v !== 'distinct' && v !== 'validate').
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forEach(fn => {
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Query.prototype[`_${fn}`] = middleware.createWrapper(fn,
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Query.prototype[`_${fn}`], null, kareemOptions);
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});
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}
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function _getContexts(hook) {
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const ret = {};
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if (hook.hasOwnProperty('query')) {
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ret.query = hook.query;
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}
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if (hook.hasOwnProperty('document')) {
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ret.document = hook.document;
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}
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return ret;
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}
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