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Mongo数据库Copy及collection的copy
本文主要是介绍Mongo数据库Copy及collection的copy，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！
数据库copy
修改变量里的目标地址IP及源DB的DB名称或URL连接名称，修改copy的collection名称
const BATCH_SIZE = 2000;
let srcConnection = "10.192.168.105_1";
let srcDb = "csms";
let dstConnection = "positioning[开发]";
let dstDb = "csms";
use(dstDb);
//idPolicy: overwrite_with_same_id|always_insert_with_new_id|insert_with_new_id_if_id_exists|skip_documents_with_existing_id|abort_if_id_already_exists|drop_collection_first|log_errors
let toCopyCollections = [
{ srcCollection: "zltest.address_type_param_random", query: {}, projection: {}, dstCollection: "zltest.address_type_param", idPolicy: "log_errors"},
{ srcCollection: "zltest.alarm_measure_random", query: {}, projection: {}, dstCollection: "zltest.alarm_measure", idPolicy: "log_errors"},
{ srcCollection: "zltest.analog_five_his_random", query: {}, projection: {}, dstCollection: "zltest.analog_five_his", idPolicy: "log_errors"},
{ srcCollection: "zltest.analog_minute_his_random", query: {}, projection: {}, dstCollection: "zltest.analog_minute_his", idPolicy: "log_errors"},
{ srcCollection: "zltest.base_param_random", query: {}, projection: {}, dstCollection: "zltest.base_param", idPolicy: "log_errors"},
{ srcCollection: "zltest.control_chargingRecord_random", query: {}, projection: {}, dstCollection: "zltest.control_chargingRecord", idPolicy: "log_errors"},
{ srcCollection: "zltest.control_logic_random", query: {}, projection: {}, dstCollection: "zltest.control_logic", idPolicy: "log_errors"},
{ srcCollection: "zltest.dev_alarm_his_random", query: {}, projection: {}, dstCollection: "zltest.dev_alarm_his", idPolicy: "log_errors"},
{ srcCollection: "zltest.dev_calibration_his_random", query: {}, projection: {}, dstCollection: "zltest.dev_calibration_his", idPolicy: "log_errors"},
{ srcCollection: "zltest.dev_his_value_random", query: {}, projection: {}, dstCollection: "zltest.dev_his_value", idPolicy: "log_errors"},
{ srcCollection: "zltest.dev_realtime_alarm_random", query: {}, projection: {}, dstCollection: "zltest.dev_realtime_alarm", idPolicy: "log_errors"},
{ srcCollection: "zltest.dev_realtime_value_random", query: {}, projection: {}, dstCollection: "zltest.dev_realtime_value", idPolicy: "log_errors"},
{ srcCollection: "zltest.device_random", query: {}, projection: {}, dstCollection: "zltest.device", idPolicy: "log_errors"},
{ srcCollection: "zltest.device_type_random", query: {}, projection: {}, dstCollection: "zltest.device_type", idPolicy: "log_errors"},
{ srcCollection: "zltest.device_version_random", query: {}, projection: {}, dstCollection: "zltest.device_version", idPolicy: "log_errors"},
{ srcCollection: "zltest.intensive_monitoring_random", query: {}, projection: {}, dstCollection: "zltest.intensive_monitoring", idPolicy: "log_errors"},
{ srcCollection: "zltest.list_edit_random", query: {}, projection: {}, dstCollection: "zltest.list_edit", idPolicy: "log_errors"},
{ srcCollection: "zltest.log_info_random", query: {}, projection: {}, dstCollection: "zltest.log_info", idPolicy: "log_errors"},
{ srcCollection: "zltest.power_diagnosis_info_random", query: {}, projection: {}, dstCollection: "zltest.power_diagnosis_info", idPolicy: "log_errors"},
{ srcCollection: "zltest.power_out_channel_data_random", query: {}, projection: {}, dstCollection: "zltest.power_out_channel_data", idPolicy: "log_errors"},
{ srcCollection: "zltest.print_edit_random", query: {}, projection: {}, dstCollection: "zltest.print_edit", idPolicy: "log_errors"},
{ srcCollection: "zltest.selfDiagnosis_handoverRecord_random", query: {}, projection: {}, dstCollection: "zltest.selfDiagnosis_handoverRecord", idPolicy: "log_errors"},
{ srcCollection: "zltest.switching_change_his_random", query: {}, projection: {}, dstCollection: "zltest.switching_change_his", idPolicy: "log_errors"},
{ srcCollection: "zltest.team_random", query: {}, projection: {}, dstCollection: "zltest.team", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.alarm_his_random", query: {}, projection: {}, dstCollection: "zhangluTest.alarm_his", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.alarm_measure_random", query: {}, projection: {}, dstCollection: "zhangluTest.alarm_measure", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.allowance_random", query: {}, projection: {}, dstCollection: "zhangluTest.allowance", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.area_random", query: {}, projection: {}, dstCollection: "zhangluTest.area", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.call_answered_history_random", query: {}, projection: {}, dstCollection: "zhangluTest.call_answered_history", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.car_random", query: {}, projection: {}, dstCollection: "zhangluTest.car", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.classes_random", query: {}, projection: {}, dstCollection: "zhangluTest.classes", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.communication_log_random", query: {}, projection: {}, dstCollection: "zhangluTest.communication_log", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.config_info_random", query: {}, projection: {}, dstCollection: "zhangluTest.config_info", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.dept_random", query: {}, projection: {}, dstCollection: "zhangluTest.dept", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.device_random", query: {}, projection: {}, dstCollection: "zhangluTest.device", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.device_config_random", query: {}, projection: {}, dstCollection: "zhangluTest.device_config", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.gatewayRecord_random", query: {}, projection: {}, dstCollection: "zhangluTest.gatewayRecord", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.job_random", query: {}, projection: {}, dstCollection: "zhangluTest.job", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.locator_card_random", query: {}, projection: {}, dstCollection: "zhangluTest.locator_card", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.log_info_random", query: {}, projection: {}, dstCollection: "zhangluTest.log_info", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.pass_area_history_random", query: {}, projection: {}, dstCollection: "zhangluTest.pass_area_history", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.pass_station_history_random", query: {}, projection: {}, dstCollection: "zhangluTest.pass_station_history", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.patrol_line_random", query: {}, projection: {}, dstCollection: "zhangluTest.patrol_line", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.patrol_plan_random", query: {}, projection: {}, dstCollection: "zhangluTest.patrol_plan", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.personnel_random", query: {}, projection: {}, dstCollection: "zhangluTest.personnel", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.position_history_random", query: {}, projection: {}, dstCollection: "zhangluTest.position_history", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.post_random", query: {}, projection: {}, dstCollection: "zhangluTest.post", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.profession_random", query: {}, projection: {}, dstCollection: "zhangluTest.profession", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.query_task_record_random", query: {}, projection: {}, dstCollection: "zhangluTest.query_task_record", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.realtime_alarm_random", query: {}, projection: {}, dstCollection: "zhangluTest.realtime_alarm", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.realtime_log_random", query: {}, projection: {}, dstCollection: "zhangluTest.realtime_log", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.realtime_value_random", query: {}, projection: {}, dstCollection: "zhangluTest.realtime_value", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.roadway_random", query: {}, projection: {}, dstCollection: "zhangluTest.roadway", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.station_status_random", query: {}, projection: {}, dstCollection: "zhangluTest.station_status", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.take_classes_random", query: {}, projection: {}, dstCollection: "zhangluTest.take_classes", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.task_config_random", query: {}, projection: {}, dstCollection: "zhangluTest.task_config", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.title_random", query: {}, projection: {}, dstCollection: "zhangluTest.title", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.uniqueness_check_random", query: {}, projection: {}, dstCollection: "zhangluTest.uniqueness_check", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.uniqueness_check_history_random", query: {}, projection: {}, dstCollection: "zhangluTest.uniqueness_check_history", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.vehicleArchives_random", query: {}, projection: {}, dstCollection: "zhangluTest.vehicleArchives", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.workforce_random", query: {}, projection: {}, dstCollection: "zhangluTest.workforce", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.workingTime_random", query: {}, projection: {}, dstCollection: "zhangluTest.workingTime", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.app_ip_random", query: {}, projection: {}, dstCollection: "zhangluTest.app_ip", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.dictionary_random", query: {}, projection: {}, dstCollection: "zhangluTest.dictionary", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.log_info_random", query: {}, projection: {}, dstCollection: "zhangluTest.log_info", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.resource_random", query: {}, projection: {}, dstCollection: "zhangluTest.resource", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.selfDiagnosis_handoverRecord_random", query: {}, projection: {}, dstCollection: "zhangluTest.selfDiagnosis_handoverRecord", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.user_info_random", query: {}, projection: {}, dstCollection: "zhangluTest.user_info", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.user_role_random", query: {}, projection: {}, dstCollection: "zhangluTest.user_role", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.config_random", query: {}, projection: {}, dstCollection: "zhangluTest.config", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.sensor_value_random", query: {}, projection: {}, dstCollection: "zhangluTest.sensor_value", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.station_rule_random", query: {}, projection: {}, dstCollection: "zhangluTest.station_rule", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.tag_random", query: {}, projection: {}, dstCollection: "zhangluTest.tag", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.device_random", query: {}, projection: {}, dstCollection: "zhangluTest.device", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.his_realtime_value_random", query: {}, projection: {}, dstCollection: "zhangluTest.his_realtime_value", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.realtime_value_random", query: {}, projection: {}, dstCollection: "zhangluTest.realtime_value", idPolicy: "log_errors"}
];
let toRecreateViews = [ ]
// if have more indexes than default index (_id), create index after copy data.
let shouldCreateIndex = true;
let totalCopyResult={
result:{},
fails:[],
}
function copyCollection(params) {
let { srcCollection, dstCollection, query, projection, idPolicy } = params;
console.log(`Copy docs from ${srcConnection}:${srcDb}:${srcCollection} to ${dstConnection}:${dstDb}:${dstCollection} start...`);
let isSameCollection = srcConnection === dstConnection && srcDb === dstDb && srcCollection === dstCollection;
if (isSameCollection) {
if (toCopyCollections.length === 1)
shouldCreateIndex = false;
else
params.shouldCreateIndex = false;
}
if (idPolicy === "drop_collection_first") {
// srcCollection is same to dstCollection, can not drop dstCollection (equal to drop srcCollection)
// drop dst collection and copy from same collection, means nothing to do.
if (isSameCollection) return;
mb.dropCollection({ connection: dstConnection, db: dstDb, collection: dstCollection });
console.log(`drop collection ${dstDb}.${dstCollection}`);
}
totalCopyResult.result[dstCollection] = {
nInserted: 0,
nModified: 0,
nSkipped: 0,
failed: 0,
};
let collectionRst = totalCopyResult.result[dstCollection];
let limitReadCount = Number.MAX_SAFE_INTEGER;
if (isSameCollection){
limitReadCount = mb.runScript({ connection: srcConnection, db: srcDb, script: `db.getCollection(${tojson(srcCollection)}).find(${tojson(query)}).count()` })
}
const batchSize = limitReadCount > BATCH_SIZE ? BATCH_SIZE : limitReadCount;
const cursor = mb.getCursorFromCollection({ connection: srcConnection, db: srcDb, collection: srcCollection, query, projection});
const totalCount=cursor.size? cursor.size() : cursor.count();
await(mb.batchReadFromCursor(cursor, batchSize, (docs) => {
return async(() => {
let readLength = docs.length;
if (!readLength) return;
let copyResult = await(mb.writeToDb({ connection: dstConnection, db: dstDb, collection: dstCollection, docs, idPolicy }));
let failed = copyResult.errors.length;
let success = copyResult.nInserted + copyResult.nModified;
collectionRst.nInserted += copyResult.nInserted;
collectionRst.nModified += copyResult.nModified;
collectionRst.nSkipped += copyResult.nSkipped;
collectionRst.failed += failed;
const processedCount=collectionRst.nInserted+collectionRst.nModified+collectionRst.nSkipped+collectionRst.failed;
const percent = (processedCount / totalCount * 100).toFixed(1);
console.log(`${dstCollection}: ${percent}% ${processedCount}/${totalCount} ${collectionRst.nInserted + collectionRst.nModified} docs successfully imported, ${collectionRst.failed} docs failed.`);
if (failed) {
console.log("Failed objects", copyResult.errors);
}
totalCopyResult.fails = [...totalCopyResult.fails, ...copyResult.errors];
})();
}));
sleep(100);
console.log(`copy docs from ${srcConnection}:${srcDb}:${srcCollection} to ${dstConnection}:${dstDb}:${dstCollection} finished.
`);
}
//Copy collections
for (let collection of toCopyCollections) {
await(copyCollection(collection));
}
//Recreate database readonly views
for (let view of toRecreateViews) {
const viewOn = tojson(view.viewOn);
const viewName= tojson(view.name);
const script= `var dropIfExists=true;
if (dropIfExists){
db.getCollection(${viewName}).drop();
}
db.getCollection(${viewOn}).aggregate(${tojson(view.pipeline)}).saveAsView(${viewName}, ${tojson(view.options)})`;
const rst=await(mb.runScript({connection: dstConnection, db: dstDb, script}));
if (!(rst && rst.ok)){
console.error(rst.message);
}else{
console.log(`re-created readonly view ${ viewName } `);
}
}
if (shouldCreateIndex){
let indexCreationPrompted = false;
function indexCreationPrompt(){
if (indexCreationPrompted) return;
const waitTime = 3;
console.log(`Index creating will start in ${waitTime} seconds...`)
sleep(1000*waitTime);
indexCreationPrompted = true;
}
let srcCollections = toCopyCollections.filter(it=>it["shouldCreateIndex"] !== false).map(it => it.srcCollection)
srcCollections.forEach(it => {
let indexes = mb.runScript({connection: srcConnection, db: srcDb, script: `db.getCollection(${tojson(it)}).getIndexes();` });
if (indexes.length > 1){
let toCopyCollection = _.find(toCopyCollections, {srcCollection: it});
if (!toCopyCollection) return;
let dstCollection = toCopyCollection.dstCollection;
indexes.forEach(index => {
if (index.name === "_id_") return;
indexCreationPrompt();
let newIndex = _.cloneDeep(index);
// remove index version and engine info, these info may fail createIndexes operator.
delete newIndex.v;
delete newIndex.textIndexVersion;
delete newIndex["2dsphereIndexVersion"];
delete newIndex.storageEngine;
newIndex.ns = `${dstDb}.${dstCollection}`;
console.log(`create index ${newIndex.name} for ${dstDb}.${dstCollection}`);
db.runCommand({
createIndexes: dstCollection,
indexes: [newIndex]
});
})
}
});
if (indexCreationPrompted)
console.log("create index complete.")
}
if(totalCopyResult.result){
let success=0;
let failed=0;
let collections=_.keys(totalCopyResult.result);
collections.forEach((key)=>{
let obj=totalCopyResult.result[key];
success+=obj.nInserted+obj.nModified;
failed+=obj.failed;
});
console.log(`
${success} document(s) of ${collections.length} collection(s) have been copied.\n`,totalCopyResult.result);
if(failed){
console.log(`${failed} document(s) haven't been copied, please check failed list below.`);
}else{
console.log("All documents copied successfully.");
}
}
if(totalCopyResult.fails.length){
console.log("All failed objects\n",totalCopyResult.fails);
}
collection的copy
修改变量里的目标地址IP及源DB的DB名称或URL连接名称，修改copy的collection名称
const BATCH_SIZE = 2000;
let srcConnection = "10.192.168.99";
let srcDb = "supervision";
let dstConnection = "positioning[开发]";
let dstDb = "test";
use(dstDb);
//idPolicy: overwrite_with_same_id|always_insert_with_new_id|insert_with_new_id_if_id_exists|skip_documents_with_existing_id|abort_if_id_already_exists|drop_collection_first|log_errors
let toCopyCollections = [
{ srcCollection: "zhangluTest.key_manage_file.files", query: {}, projection: {}, dstCollection: "zhangluTest.key_manage_file.files", idPolicy: "log_errors"},
{ srcCollection: "zhangluTest.key_manage_file.chunks", query: {}, projection: {}, dstCollection: "zhangluTest.key_manage_file.chunks", idPolicy: "log_errors"}
];
let toRecreateViews = [ ]
// if have more indexes than default index (_id), create index after copy data.
let shouldCreateIndex = true;
let totalCopyResult={
result:{},
fails:[],
}
function copyCollection(params) {
let { srcCollection, dstCollection, query, projection, idPolicy } = params;
console.log(`Copy docs from ${srcConnection}:${srcDb}:${srcCollection} to ${dstConnection}:${dstDb}:${dstCollection} start...`);
let isSameCollection = srcConnection === dstConnection && srcDb === dstDb && srcCollection === dstCollection;
if (isSameCollection) {
if (toCopyCollections.length === 1)
shouldCreateIndex = false;
else
params.shouldCreateIndex = false;
}
if (idPolicy === "drop_collection_first") {
// srcCollection is same to dstCollection, can not drop dstCollection (equal to drop srcCollection)
// drop dst collection and copy from same collection, means nothing to do.
if (isSameCollection) return;
mb.dropCollection({ connection: dstConnection, db: dstDb, collection: dstCollection });
console.log(`drop collection ${dstDb}.${dstCollection}`);
}
totalCopyResult.result[dstCollection] = {
nInserted: 0,
nModified: 0,
nSkipped: 0,
failed: 0,
};
let collectionRst = totalCopyResult.result[dstCollection];
let limitReadCount = Number.MAX_SAFE_INTEGER;
if (isSameCollection){
limitReadCount = mb.runScript({ connection: srcConnection, db: srcDb, script: `db.getCollection(${tojson(srcCollection)}).find(${tojson(query)}).count()` })
}
const batchSize = limitReadCount > BATCH_SIZE ? BATCH_SIZE : limitReadCount;
const cursor = mb.getCursorFromCollection({ connection: srcConnection, db: srcDb, collection: srcCollection, query, projection});
const totalCount=cursor.size? cursor.size() : cursor.count();
await(mb.batchReadFromCursor(cursor, batchSize, (docs) => {
return async(() => {
let readLength = docs.length;
if (!readLength) return;
let copyResult = await(mb.writeToDb({ connection: dstConnection, db: dstDb, collection: dstCollection, docs, idPolicy }));
let failed = copyResult.errors.length;
let success = copyResult.nInserted + copyResult.nModified;
collectionRst.nInserted += copyResult.nInserted;
collectionRst.nModified += copyResult.nModified;
collectionRst.nSkipped += copyResult.nSkipped;
collectionRst.failed += failed;
const processedCount=collectionRst.nInserted+collectionRst.nModified+collectionRst.nSkipped+collectionRst.failed;
const percent = (processedCount / totalCount * 100).toFixed(1);
console.log(`${dstCollection}: ${percent}% ${processedCount}/${totalCount} ${collectionRst.nInserted + collectionRst.nModified} docs successfully imported, ${collectionRst.failed} docs failed.`);
if (failed) {
console.log("Failed objects", copyResult.errors);
}
totalCopyResult.fails = [...totalCopyResult.fails, ...copyResult.errors];
})();
}));
sleep(100);
console.log(`copy docs from ${srcConnection}:${srcDb}:${srcCollection} to ${dstConnection}:${dstDb}:${dstCollection} finished.
`);
}
//Copy collections
for (let collection of toCopyCollections) {
await(copyCollection(collection));
}
//Recreate database readonly views
for (let view of toRecreateViews) {
const viewOn = tojson(view.viewOn);
const viewName= tojson(view.name);
const script= `var dropIfExists=false;
if (dropIfExists){
db.getCollection(${viewName}).drop();
}
db.getCollection(${viewOn}).aggregate(${tojson(view.pipeline)}).saveAsView(${viewName}, ${tojson(view.options)})`;
const rst=await(mb.runScript({connection: dstConnection, db: dstDb, script}));
if (!(rst && rst.ok)){
console.error(rst.message);
}else{
console.log(`re-created readonly view ${ viewName } `);
}
}
if (shouldCreateIndex){
let indexCreationPrompted = false;
function indexCreationPrompt(){
if (indexCreationPrompted) return;
const waitTime = 3;
console.log(`Index creating will start in ${waitTime} seconds...`)
sleep(1000*waitTime);
indexCreationPrompted = true;
}
let srcCollections = toCopyCollections.filter(it=>it["shouldCreateIndex"] !== false).map(it => it.srcCollection)
srcCollections.forEach(it => {
let indexes = mb.runScript({connection: srcConnection, db: srcDb, script: `db.getCollection(${tojson(it)}).getIndexes();` });
if (indexes.length > 1){
let toCopyCollection = _.find(toCopyCollections, {srcCollection: it});
if (!toCopyCollection) return;
let dstCollection = toCopyCollection.dstCollection;
indexes.forEach(index => {
if (index.name === "_id_") return;
indexCreationPrompt();
let newIndex = _.cloneDeep(index);
// remove index version and engine info, these info may fail createIndexes operator.
delete newIndex.v;
delete newIndex.textIndexVersion;
delete newIndex["2dsphereIndexVersion"];
delete newIndex.storageEngine;
newIndex.ns = `${dstDb}.${dstCollection}`;
console.log(`create index ${newIndex.name} for ${dstDb}.${dstCollection}`);
db.runCommand({
createIndexes: dstCollection,
indexes: [newIndex]
});
})
}
});
if (indexCreationPrompted)
console.log("create index complete.")
}
if(totalCopyResult.result){
let success=0;
let failed=0;
let collections=_.keys(totalCopyResult.result);
collections.forEach((key)=>{
let obj=totalCopyResult.result[key];
success+=obj.nInserted+obj.nModified;
failed+=obj.failed;
});
console.log(`
${success} document(s) of ${collections.length} collection(s) have been copied.\n`,totalCopyResult.result);
if(failed){
console.log(`${failed} document(s) haven't been copied, please check failed list below.`);
}else{
console.log("All documents copied successfully.");
}
}
if(totalCopyResult.fails.length){
console.log("All failed objects\n",totalCopyResult.fails);
}
这篇关于Mongo数据库Copy及collection的copy的文章就介绍到这儿，希望我们推荐的文章对大家有所帮助，也希望大家多多支持为之网！
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