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66 lines
2.2 KiB
66 lines
2.2 KiB
5 years ago
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'use strict';
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const cleanPositionalOperators = require('../schema/cleanPositionalOperators');
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const get = require('../get');
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/*!
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* Like `schema.path()`, except with a document, because impossible to
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* determine path type without knowing the embedded discriminator key.
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*/
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module.exports = function getEmbeddedDiscriminatorPath(schema, update, filter, path) {
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const parts = path.split('.');
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let schematype = null;
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let type = 'adhocOrUndefined';
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filter = filter || {};
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update = update || {};
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for (let i = 0; i < parts.length; ++i) {
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const subpath = cleanPositionalOperators(parts.slice(0, i + 1).join('.'));
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schematype = schema.path(subpath);
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if (schematype == null) {
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continue;
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}
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type = schema.pathType(subpath);
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if ((schematype.$isSingleNested || schematype.$isMongooseDocumentArrayElement) &&
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schematype.schema.discriminators != null) {
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const discriminators = schematype.schema.discriminators;
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const key = get(schematype, 'schema.options.discriminatorKey');
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const discriminatorValuePath = subpath + '.' + key;
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const discriminatorFilterPath =
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discriminatorValuePath.replace(/\.\d+\./, '.');
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let discriminatorKey = null;
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if (discriminatorValuePath in filter) {
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discriminatorKey = filter[discriminatorValuePath];
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}
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if (discriminatorFilterPath in filter) {
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discriminatorKey = filter[discriminatorFilterPath];
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}
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const wrapperPath = subpath.replace(/\.\d+$/, '');
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if (schematype.$isMongooseDocumentArrayElement &&
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get(filter[wrapperPath], '$elemMatch.' + key) != null) {
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discriminatorKey = filter[wrapperPath].$elemMatch[key];
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}
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if (discriminatorValuePath in update) {
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discriminatorKey = update[discriminatorValuePath];
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}
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if (discriminatorKey == null || discriminators[discriminatorKey] == null) {
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continue;
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}
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const rest = parts.slice(i + 1).join('.');
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schematype = discriminators[discriminatorKey].path(rest);
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if (schematype != null) {
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type = discriminators[discriminatorKey]._getPathType(rest);
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break;
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}
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}
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}
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return { type: type, schematype: schematype };
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};
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