68 lines
1.8 KiB
JavaScript
68 lines
1.8 KiB
JavaScript
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var _ = require('underscore');
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var Backbone = require('backbone');
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var CDB = require('internal-carto.js');
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var queryTemplate = _.template('SELECT <%= column %> FROM (<%= sql %>) _table_sql GROUP BY <%= column %> ORDER BY <%= column %> ASC');
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var MAX_ROW_COUNT = 100;
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module.exports = Backbone.Model.extend({
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initialize: function (attrs, opts) {
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if (!opts.configModel) throw new Error('configModel param is required');
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if (!opts.nodeDefModel) throw new Error('nodeDefModel param is required');
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this._query = opts.nodeDefModel.querySchemaModel.get('query');
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this._rowData = [];
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this._SQL = new CDB.SQL({
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user: opts.configModel.get('user_name'),
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sql_api_template: opts.configModel.get('sql_api_template'),
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api_key: opts.configModel.get('api_key')
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});
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this.on('change:column', this.fetch, this);
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},
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_onQueryDone: function (r) {
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var resultCount = _.size(r.rows);
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if (resultCount && resultCount < MAX_ROW_COUNT) {
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this._rowData = _.pluck(r.rows, this.get('column'));
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this.trigger('columnsFetched', this._rowData);
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}
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},
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fetch: function () {
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if (this.get('column') && this._query) {
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this._SQL.execute(
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queryTemplate({
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sql: this._query,
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column: this.get('column')
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}),
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null,
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{
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extra_params: ['page', 'rows_per_page'],
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page: 0,
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rows_per_page: 40,
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success: this._onQueryDone.bind(this),
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error: function () {
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// TODO: what happens if fails?
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}
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}
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);
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}
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},
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getRows: function () {
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var rowDataCount = _.size(this._rowData);
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if (rowDataCount > 0) {
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if (rowDataCount && rowDataCount < MAX_ROW_COUNT) {
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return _.reject(this._rowData, _.isNull);
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} else {
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return false;
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}
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} else {
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return false;
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}
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}
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});
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