rxdb
Version:
A local-first realtime NoSQL Database for JavaScript applications - https://rxdb.info/
87 lines • 2.68 kB
JavaScript
/**
* this plugin adds the json export/import capabilities to RxDB
*/
import { createRxQuery, queryCollection, _getDefaultQuery } from "../../rx-query.js";
import { newRxError } from "../../rx-error.js";
import { flatClone, getDefaultRevision, now } from "../../plugins/utils/index.js";
function dumpRxDatabase(collections) {
var json = {
name: this.name,
instanceToken: this.token,
collections: []
};
var useCollections = Object.keys(this.collections).filter(colName => !collections || collections.includes(colName)).filter(colName => colName.charAt(0) !== '_').map(colName => this.collections[colName]);
return Promise.all(useCollections.map(col => col.exportJSON())).then(cols => {
json.collections = cols;
return json;
});
}
var importDumpRxDatabase = function (dump) {
/**
* collections must be created before the import
* because we do not know about the other collection-settings here
*/
var missingCollections = dump.collections.filter(col => !this.collections[col.name]).map(col => col.name);
if (missingCollections.length > 0) {
throw newRxError('JD1', {
missingCollections
});
}
return Promise.all(dump.collections.map(colDump => this.collections[colDump.name].importJSON(colDump)));
};
var dumpRxCollection = async function () {
var json = {
name: this.name,
schemaHash: await this.schema.hash,
docs: []
};
var query = createRxQuery('find', _getDefaultQuery(), this);
return queryCollection(query).then(docs => {
json.docs = docs.map(docData => {
docData = flatClone(docData);
delete docData._rev;
delete docData._attachments;
return docData;
});
return json;
});
};
async function importDumpRxCollection(exportedJSON) {
// check schemaHash
if (exportedJSON.schemaHash !== (await this.schema.hash)) {
throw newRxError('JD2', {
schemaHash: exportedJSON.schemaHash,
own: this.schema.hash
});
}
var docs = exportedJSON.docs;
return this.storageInstance.bulkWrite(docs.map(docData => {
var document = Object.assign({}, docData, {
_meta: {
lwt: now()
},
_rev: getDefaultRevision(),
_attachments: {},
_deleted: false
});
return {
document
};
}), 'json-dump-import');
}
export var RxDBJsonDumpPlugin = {
name: 'json-dump',
rxdb: true,
prototypes: {
RxDatabase: proto => {
proto.exportJSON = dumpRxDatabase;
proto.importJSON = importDumpRxDatabase;
},
RxCollection: proto => {
proto.exportJSON = dumpRxCollection;
proto.importJSON = importDumpRxCollection;
}
},
overwritable: {}
};
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