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[英]Must you manually create a database in mysql before automigrating from models in loopback?
[英]LoopBack: Import models from MySql
问题如下:我有一个在MySql中设计的数据库和架构,并且我试图在LoopBack中自动导入到我的api库中以使用这些模型。 我已阅读以下帮助: http : //loopback.io/doc/en/lb2/Discovering-models-from-relational-databases.html#additional-discovery-functions但它不起作用。
我已经尝试过,更改数据记录器的库存(数据库中表的名称。
var loopback = require('loopback');
var ds = loopback.createDataSource('mysql', {
"host": "localhost",
"port": 3306,
"database": "maintenancetooldb",
"username": "root",
"password": "Password_4567"
});
// Discover and build models from INVENTORY table
ds.discoverAndBuildModels('datalogger', {visited: {}, associations: true},
function (err, models) {
console.log(JSON.stringify(inv, null, 2));
// Now we have a list of models keyed by the model name
// Find the first record from the inventory
models.datalogger.findOne({}, function (err, inv) {
if(err) {
console.error(err);
console.log(JSON.stringify(inv, null, 2));
return;
}
console.log("\nInventory: ", inv);
// Navigate to the product model
// Assumes inventory table has a foreign key relationship to product table
inv.product(function (err, prod) {
console.log("\nProduct: ", prod);
console.log("\n ------------- ");
});
});
});
老实说,我迷路了,昨天我第一次使用sequelize-auto,但今天的要求已更改。
在此先感谢您的帮助。
你可以试试这个吗
var _ = require('lodash');
var path = require('path');
var fs = require('fs');
var loopback = require('loopback');
var outputPath = '/home/rahul/Loopback/Helloworld/common/models';
var loopback = require('loopback');
var ds = loopback.createDataSource('mysql', {
"host": "localhost",
"port": 3306,
"database": "XXX",
"username": "XXX",
"password": "XXX"
});
ds.discoverModelDefinitions({ schema: 'My-schema' }, function (err, models) {
var count = models.length;
_.each(models, function(model){
//console.log(model.name);
ds.discoverSchema(model.name, { associations: false }, function(err, schema){ // instead of model.name just mention your table name
//console.log("GG0");
//console.log("GG"+schema.name);
var outputName = outputPath + '/' +schema.name + '.json';
fs.writeFile(outputName, JSON.stringify(schema, null, 2), function(err) {
if(err) {
console.log(err);
} else {
console.log("JSON saved to " + outputName);
}
});
fs.writeFile(outputPath + '/' + schema.name + '.js', schema.name, function(err) {
if (err) throw err;
console.log('Created ' + schema.name + '.json file');
});
count = count - 1;
if (count === 0) {
console.log("DONE!", count);
ds.disconnect();
return;
}
});
})
});
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