50 lines
1.5 KiB
JavaScript
50 lines
1.5 KiB
JavaScript
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let mongodb = require('mongodb');
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let Collection = mongodb.Collection;
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export default class MongoCollection {
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_mongoCollection:Collection;
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constructor(mongoCollection:Collection) {
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this._mongoCollection = mongoCollection;
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}
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// Does a find with "smart indexing".
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// Currently this just means, if it needs a geoindex and there is
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// none, then build the geoindex.
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// This could be improved a lot but it's not clear if that's a good
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// idea. Or even if this behavior is a good idea.
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find(query, { skip, limit, sort } = {}) {
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return this._rawFind(query, { skip, limit, sort })
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.catch(error => {
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// Check for "no geoindex" error
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if (error.code != 17007 ||
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!error.message.match(/unable to find index for .geoNear/)) {
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throw error;
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}
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// Figure out what key needs an index
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let key = error.message.match(/field=([A-Za-z_0-9]+) /)[1];
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if (!key) {
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throw error;
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}
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var index = {};
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index[key] = '2d';
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//TODO: condiser moving index creation logic into Schema.js
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return this._mongoCollection.createIndex(index)
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// Retry, but just once.
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.then(() => this._rawFind(query, { skip, limit, sort }));
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});
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}
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_rawFind(query, { skip, limit, sort } = {}) {
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return this._mongoCollection
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.find(query, { skip, limit, sort })
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.toArray();
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}
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count(query, { skip, limit, sort } = {}) {
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return this._mongoCollection.count(query, { skip, limit, sort });
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}
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}
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