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Merge pull request #5 from jura-b/feature/general-get-include-support
Find by id support
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,82 +1,177 @@ | ||
| 'use strict'; | ||
|
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| const _ = require('lodash'); | ||
|
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| module.exports = function(Model, options) { | ||
| var modelHasManyThroughRelations, modelRelations; | ||
|
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| Model.on('attached', function() { | ||
| var relations = Model.settings.relations || Model.relations; | ||
| modelRelations = Model.settings.relations || Model.relations; | ||
|
|
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| if (relations) { | ||
| Object.keys(relations).forEach(function(targetModel) { | ||
| if (modelRelations) { | ||
| modelHasManyThroughRelations = []; | ||
| Object.keys(modelRelations).forEach(function(targetModel) { | ||
| var type = | ||
| (relations[targetModel].modelThrough || relations[targetModel].through) ? | ||
| 'hasManyThrough' : relations[targetModel].type; | ||
| (modelRelations[targetModel].modelThrough || modelRelations[targetModel].through) ? | ||
| 'hasManyThrough' : modelRelations[targetModel].type; | ||
|
|
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| if (type === 'hasManyThrough') { | ||
| Model.afterRemote('prototype.__get__' + targetModel, injectIncludes); | ||
| Model.afterRemote('prototype.__create__' + targetModel, injectIncludes); | ||
| Model.afterRemote('prototype.__get__' + targetModel, controller); | ||
| Model.afterRemote('prototype.__create__' + targetModel, controller); | ||
| modelHasManyThroughRelations.push(targetModel); | ||
| } | ||
| }); | ||
|
|
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| if (modelHasManyThroughRelations.length) { | ||
| Model.afterRemote('findById', controller); | ||
| } | ||
| } | ||
| }); | ||
|
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| function injectIncludes(ctx, unused, next) { | ||
| if (!ctx.result) return next(); | ||
|
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| var relationName = ctx.methodString.match(/__([a-z\d]+)$/)[1]; | ||
|
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| if ( | ||
| !(options.relations && options.relations.indexOf(relationName) !== -1) && | ||
| !(ctx.args.filter && ctx.args.filter.includeThrough) | ||
| ) return next(); | ||
|
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| var relationKey = Model.relations[relationName].keyTo; | ||
| var throughKey = Model.relations[relationName].keyThrough; | ||
| var relationModel = Model.relations[relationName].modelTo; | ||
| var throughModel = Model.relations[relationName].modelThrough; | ||
| var idName = relationModel.definition.idName() || 'id'; | ||
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| var newResult = JSON.parse(JSON.stringify(ctx.result)); | ||
|
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| var query = {where: {}}; | ||
| query.where[relationKey] = ctx.instance.id; | ||
|
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| if (Array.isArray(newResult)) { | ||
| query.where[throughKey] = {inq: newResult.map(function(item) { return item[idName]; })}; | ||
| function controller(ctx, unused, next) { | ||
| if (ctx.methodString.indexOf('prototype.__get__') !== -1) { | ||
| // the original version | ||
| var relationName = ctx.methodString.match(/__([a-z\d]+)$/)[1]; | ||
| var partialResult = JSON.parse(JSON.stringify(ctx.result)); | ||
| injectIncludes(ctx, partialResult, relationName).then(function(partialResult) { | ||
| ctx.result = partialResult; | ||
| next(); | ||
| }); | ||
| } else { | ||
| query.where[throughKey] = {inq: [newResult[idName]]}; | ||
| } | ||
| // extension | ||
| var newResult = JSON.parse(JSON.stringify(ctx.result)); | ||
|
|
||
| if ( | ||
| ctx.args.filter && | ||
| ctx.args.filter.includeThrough && | ||
| ctx.args.filter.includeThrough.fields | ||
| ) { | ||
| query.fields = [throughKey, ctx.args.filter.includeThrough.fields]; | ||
| } else if (options.fields && options.fields[relationName]) { | ||
| query.fields = [throughKey, options.fields[relationName]]; | ||
| var filter = ctx.req && ctx.req.query && ctx.req.query.filter; | ||
| if (filter) { | ||
| if (typeof filter === 'string') { | ||
| filter = JSON.parse(filter); | ||
| } | ||
| var include = filter.include; // string, [string], object | ||
|
|
||
| // only support one level of includes | ||
| var relationNames = []; | ||
| if (_.isString(include)) { | ||
| relationNames.push(include); | ||
| } else if (_.isArray(include)) { | ||
| for (let elm of include) { | ||
| if (typeof elm === 'string') { | ||
| relationNames.push(elm); | ||
| } else if (typeof elm === 'object') { | ||
| for (let prop in elm) { | ||
| relationNames.push(prop); | ||
| } | ||
| } | ||
| } | ||
| } else if (_.isObject(include)) { | ||
| for (let prop in include) { | ||
| relationNames.push(prop); | ||
| } | ||
| } | ||
| relationNames = _.uniq(relationNames); | ||
|
|
||
| let promises = []; | ||
| for (let relationName of relationNames) { | ||
| if (modelHasManyThroughRelations.includes(relationName)) { | ||
| let partialResult = newResult[relationName]; | ||
| let promise = injectIncludes(ctx, partialResult, relationName) | ||
| .then(function(partialResult) { | ||
| return new Promise(function(res, rej) { | ||
| newResult[relationName] = partialResult; | ||
| res(); | ||
| }); | ||
| }); | ||
| promises.push(promise); | ||
| } | ||
| } | ||
| if (promises.length) { | ||
| Promise.all(promises).then(function() { | ||
| ctx.result = newResult; | ||
| next(); | ||
| }); | ||
| } else { | ||
| next(); | ||
| } | ||
| } else { | ||
| next(); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| function injectIncludes(ctx, partialResult, relationName) { | ||
| return new Promise(function(res, rej) { | ||
| var relationSetting, isRelationRegistered; | ||
| if (options.relations) { | ||
| relationSetting = _.find(options.relations, {name: relationName}); | ||
| if (relationSetting) { | ||
| isRelationRegistered = true; | ||
| } else if (options.relations.indexOf(relationName) !== -1) { | ||
| isRelationRegistered = true; | ||
| relationSetting = {}; | ||
| relationSetting.name = relationName; | ||
| } else { | ||
| isRelationRegistered = false; | ||
| } | ||
| } | ||
| if (!isRelationRegistered && !(ctx.args.filter && ctx.args.filter.includeThrough)) { | ||
| return res(partialResult); | ||
| } | ||
|
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| throughModel.find(query, function(err, results) { | ||
| if (err) return next(); | ||
| var relationKey = Model.relations[relationSetting.name].keyTo; | ||
| var throughKey = Model.relations[relationSetting.name].keyThrough; | ||
| var relationModel = Model.relations[relationSetting.name].modelTo; | ||
| var throughModel = Model.relations[relationSetting.name].modelThrough; | ||
|
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| var resultsHash = {}; | ||
| results.forEach(function(result) { | ||
| resultsHash[result[throughKey].toString()] = result; | ||
| }); | ||
| if (!relationModel) { | ||
| return res(partialResult); | ||
| } | ||
| var idName = relationModel.definition.idName() || 'id'; | ||
|
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| if (Array.isArray(newResult)) { | ||
| for (var i = 0; i < newResult.length; i++) { | ||
| if (resultsHash[newResult[i][idName].toString()]) { | ||
| newResult[i][throughModel.definition.name] = | ||
| resultsHash[newResult[i][idName].toString()]; | ||
| } | ||
| } | ||
| var query = {where: {}}; | ||
| if (ctx.instance) { | ||
| query.where[relationKey] = ctx.instance.id; | ||
| } else { | ||
| query.where[relationKey] = ctx.args.id; | ||
| } | ||
|
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| if (Array.isArray(partialResult)) { | ||
| query.where[throughKey] = {inq: partialResult.map(function(item) { return item[idName]; })}; | ||
| } else { | ||
| newResult[throughModel.definition.name] = resultsHash[newResult[idName].toString()]; | ||
| query.where[throughKey] = {inq: [partialResult[idName]]}; | ||
| } | ||
|
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| ctx.result = newResult; | ||
| if ( | ||
| ctx.args.filter && | ||
| ctx.args.filter.includeThrough && | ||
| ctx.args.filter.includeThrough.fields | ||
| ) { | ||
| query.fields = [throughKey, ctx.args.filter.includeThrough.fields]; | ||
| } else if (options.fields && options.fields[relationSetting.name]) { | ||
| query.fields = [throughKey, options.fields[relationSetting.name]]; | ||
| } | ||
|
|
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| next(); | ||
| throughModel.find(query, function(err, results) { | ||
| if (err) return res(partialResult); | ||
| else { | ||
| var throughPropertyName = relationSetting.asProperty || throughModel.definition.name; | ||
| var resultsHash = {}; | ||
| results.forEach(function(result) { | ||
| resultsHash[result[throughKey].toString()] = result; | ||
| }); | ||
|
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||
| if (Array.isArray(partialResult)) { | ||
| for (var i = 0; i < partialResult.length; i++) { | ||
| if (resultsHash[partialResult[i][idName].toString()]) { | ||
| partialResult[i][throughPropertyName] = | ||
| resultsHash[partialResult[i][idName].toString()]; | ||
| } | ||
| } | ||
| } else { | ||
| partialResult[throughPropertyName] = | ||
| resultsHash[partialResult[idName].toString()]; | ||
| } | ||
| return res(partialResult); | ||
| } | ||
| }); | ||
| }); | ||
| }; | ||
| }; |
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