-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
extract aggregation queries to a new tag
- Loading branch information
Showing
4 changed files
with
160 additions
and
110 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| import {defaults} from 'lodash' | ||
| import Promise from 'bluebird' | ||
| import {Item} from '../../models' | ||
| import jsonic from 'jsonic' | ||
| import _ from 'lodash' | ||
| const {ObjectID} = require('mongodb') | ||
|
|
||
| const mapValuesDeep = (obj, iteree) => | ||
| _.isArray(obj) ? _.map(obj, v => mapValuesDeep(v, iteree)) : ( | ||
| _.isObject(obj) ? _.mapValues(obj, v => mapValuesDeep(v, iteree)) : iteree(obj) | ||
| ) | ||
|
|
||
| export class query { | ||
| constructor(renderContext) { | ||
| this.tags = ['query'] | ||
| } | ||
|
|
||
| parse(parser, nodes, lexer) { | ||
| const tok = parser.nextToken(); | ||
|
|
||
| const catalog = parser.parseSignature(null, true); | ||
| parser.advanceAfterBlockEnd(tok.value); | ||
|
|
||
| let body = parser.parseUntilBlocks('else', 'endquery'); | ||
| var elseBody = null; | ||
|
|
||
| if(parser.skipSymbol('else')) { | ||
| parser.skip(lexer.TOKEN_BLOCK_END); | ||
| elseBody = parser.parseUntilBlocks('endquery'); | ||
| } | ||
|
|
||
| parser.advanceAfterBlockEnd(); | ||
|
|
||
| return new nodes.CallExtensionAsync(this, 'run', catalog, [body, elseBody]); | ||
| } | ||
|
|
||
| async run({ctx}, collection, options, body, elseBody, callback) { | ||
| if (ctx.inspect) { | ||
| return callback(null, '') | ||
| } | ||
|
|
||
| const opts = defaults(options, {as: 'item'}) | ||
| const key = opts.as | ||
| const originalValue = ctx[key] | ||
| const asyncBody = Promise.promisify(body) | ||
|
|
||
| try { | ||
| let aggregate = jsonic(options.query).map(step => mapValuesDeep(step, value => { | ||
| if (value && value.toString().startsWith('ID/')) return ObjectID(value.replace('ID/', '')) | ||
| else return value | ||
| })) | ||
| aggregate = [ | ||
| { | ||
| $match: { | ||
| site: ObjectID(ctx.req.site._id) | ||
| } | ||
| }, | ||
| ...aggregate | ||
| ] | ||
|
|
||
| if (opts.pageSize) { | ||
| const countResult = await Item.collection.aggregate([...aggregate, {$count: 'count'}]).toArray() | ||
| ctx.itemsCount = countResult[0].count | ||
| let page = ctx.req.query.page | ||
| if (!page || isNaN(page)) { | ||
| page = 1 | ||
| } | ||
| ctx.pageNumber = page | ||
| ctx.pagesCount = Math.ceil(ctx.itemsCount / opts.pageSize) | ||
| aggregate = [...aggregate, {$skip: (page - 1) * opts.pageSize}, {$limit: opts.pageSize}] | ||
| } | ||
|
|
||
| const items = await Item.collection.aggregate(aggregate).toArray() | ||
|
|
||
| if (items.length === 0) { | ||
| callback(null, elseBody ? elseBody() : '') | ||
| return | ||
| } | ||
|
|
||
| const data = await Promise.all(_.map(items, async item => { | ||
| const currentItem = await item | ||
| ctx[key] = currentItem | ||
| return asyncBody() | ||
| }, {concurrency: 1})) // concurrency is crucial here as body() call reads current context | ||
|
|
||
| ctx[key] = originalValue | ||
| callback(null, data.join('')) | ||
| } catch (e) { | ||
| console.log(e); | ||
| callback(e) | ||
| } | ||
| } | ||
| } |