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Standard Importer
closes #734 - use models instead of knex so that we know we get correct data - preprocesses post_tags, adds the right tags back to the posts TODO - deduplicate posts (if they have the same title and slug?)
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core/server/data/import/000.js
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158
core/server/data/import/000.js
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var when = require("when"),
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_ = require("underscore"),
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models = require('../../models'),
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errors = require('../../errorHandling'),
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Importer000;
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Importer000 = function () {
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_.bindAll(this, "basicImport");
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this.version = "000";
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this.importFrom = {
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"000": this.basicImport
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};
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};
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Importer000.prototype.importData = function (data) {
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return this.canImport(data)
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.then(function (importerFunc) {
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return importerFunc(data);
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}, function (reason) {
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return when.reject(reason);
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});
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};
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Importer000.prototype.canImport = function (data) {
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if (data.meta && data.meta.version && this.importFrom[data.meta.version]) {
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return when.resolve(this.importFrom[data.meta.version]);
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}
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return when.reject("Unsupported version of data");
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};
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function stripProperties(properties, data) {
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_.each(data, function (obj) {
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_.each(properties, function (property) {
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delete obj[property];
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});
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});
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return data;
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}
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function preProcessPostTags(tableData) {
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var postTags,
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postsWithTags = {};
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postTags = tableData.posts_tags;
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_.each(postTags, function (post_tag) {
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if (!postsWithTags.hasOwnProperty(post_tag.post_id)) {
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postsWithTags[post_tag.post_id] = [];
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}
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postsWithTags[post_tag.post_id].push(post_tag.tag_id);
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});
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_.each(postsWithTags, function (tag_ids, post_id) {
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var post, tags;
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post = _.find(tableData.posts, function (post) {
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return post.id === parseInt(post_id, 10);
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});
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if (post) {
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tags = _.filter(tableData.tags, function (tag) {
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return _.indexOf(tag_ids, tag.id) !== -1;
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});
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post.tags = [];
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_.each(tags, function (tag) {
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// names are unique.. this should get the right tags added
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// as long as tags are added first;
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post.tags.push({name: tag.name});
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});
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}
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});
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return tableData;
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}
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function importTags(ops, tableData) {
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tableData = stripProperties(['id'], tableData);
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_.each(tableData, function (tag) {
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ops.push(models.Tag.add(tag));
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});
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}
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function importPosts(ops, tableData) {
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tableData = stripProperties(['id'], tableData);
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_.each(tableData, function (post) {
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ops.push(models.Post.add(post));
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});
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}
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function importUsers(ops, tableData) {
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tableData = stripProperties(['id'], tableData);
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tableData[0].id = 1;
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ops.push(models.User.edit(tableData[0]));
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}
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function importSettings(ops, tableData) {
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// for settings we need to update individual settings, and insert any missing ones
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// the one setting we MUST NOT update is the databaseVersion settings
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var blackList = ['databaseVersion'];
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tableData = stripProperties(['id'], tableData);
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tableData = _.filter(tableData, function (data) {
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return blackList.indexOf(data.key) === -1;
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});
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ops.push(models.Settings.edit(tableData));
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}
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// No data needs modifying, we just import whatever tables are available
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Importer000.prototype.basicImport = function (data) {
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var ops = [],
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tableData = data.data;
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// Do any pre-processing of relationships (we can't depend on ids)
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if (tableData.posts_tags && tableData.posts && tableData.tags) {
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tableData = preProcessPostTags(tableData);
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}
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// Import things in the right order:
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if (tableData.tags && tableData.tags.length) {
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importTags(ops, tableData.tags);
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}
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if (tableData.posts && tableData.posts.length) {
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importPosts(ops, tableData.posts);
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}
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if (tableData.users && tableData.users.length) {
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importUsers(ops, tableData.users);
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}
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if (tableData.settings && tableData.settings.length) {
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importSettings(ops, tableData.settings);
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}
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/** do nothing with these tables, the data shouldn't have changed from the fixtures
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* permissions
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* roles
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* permissions_roles
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* permissions_users
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* roles_users
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*/
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return when.all(ops).then(function (results) {
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return when.resolve(results);
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}, function (err) {
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return when.reject("Error importing data: " + err.message || err, err.stack);
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});
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};
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module.exports = {
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Importer000: Importer000,
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importData: function (data) {
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return new Importer000().importData(data);
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}
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};
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