public static async Task SeedAsync(RestfulContext restfulContext,
ILoggerFactory loggerFactory,
int retry = 0)
{
var retryForAvailability = retry;
try
{
if (restfulContext.Countries.Any())
{
return;
}
var countries = new List <Country>
{
new Country
{
EnglishName = "China",
ChineseName = "中华人民共和国",
Abbreviation = "中国",
Cities = new List <City>
{
new City {
Name = "北京", Description = "首都"
},
new City {
Name = "上海", Description = "魔都"
},
new City {
Name = "深圳"
},
new City {
Name = "杭州"
},
new City {
Name = "天津"
}
}
},
new Country
{
EnglishName = "USA",
ChineseName = "美利坚合众国",
Abbreviation = "美国",
Cities = new List <City>
{
new City {
Name = "New York"
},
new City {
Name = "Chicago"
},
new City {
Name = "San Fransisco"
},
new City {
Name = "Los Angeles"
},
new City {
Name = "Miami"
}
}
},
new Country
{
EnglishName = "Finland",
ChineseName = "芬兰",
Abbreviation = "芬兰",
Cities = new List <City>
{
new City {
Name = "Helsinki"
},
new City {
Name = "Espoo"
},
new City {
Name = "Tampere"
}
}
},
new Country
{
EnglishName = "UK",
ChineseName = "大不列颠及北爱尔兰联合王国",
Abbreviation = "英国",
Cities = new List <City>
{
new City {
Name = "London"
},
new City {
Name = "Liverpool"
},
new City {
Name = "Manchester"
},
new City {
Name = "Birmingham"
},
new City {
Name = "Glasgow"
}
}
},
new Country
{
EnglishName = "Denmark",
ChineseName = "丹麦",
Abbreviation = "丹麦",
Cities = new List <City>
{
new City {
Name = "Copenhagen "
}
}
},
new Country
{
EnglishName = "Norway",
ChineseName = "挪威",
Abbreviation = "挪威",
Cities = new List <City>
{
new City {
Name = "Oslo"
}
}
},
new Country
{
EnglishName = "Sweden",
ChineseName = "瑞典",
Abbreviation = "瑞典",
Cities = new List <City>
{
new City {
Name = "Stockholm"
}
}
},
new Country
{
EnglishName = "Germany",
ChineseName = "德意志联邦共和国",
Abbreviation = "德国",
Cities = new List <City>
{
new City {
Name = "Berlin"
}
}
},
new Country
{
EnglishName = "Poland",
ChineseName = "波兰",
Abbreviation = "波兰",
Cities = new List <City>
{
new City {
Name = "Warsaw"
}
}
},
new Country
{
EnglishName = "Switzerland",
ChineseName = "瑞士",
Abbreviation = "瑞士",
Cities = new List <City>
{
new City {
Name = "Bern"
}
}
},
new Country
{
EnglishName = "Austria",
ChineseName = "奥地利",
Abbreviation = "奥地利",
Cities = new List <City>
{
new City {
Name = "Vienna"
}
}
}
};
restfulContext.AddRange(countries);
await restfulContext.SaveChangesAsync();
}
catch (Exception e)
{
if (retryForAvailability < 10)
{
retryForAvailability++;
var logger = loggerFactory.CreateLogger <RestfulContextSeed>();
logger.LogError(e, "Seed fault");
await SeedAsync(restfulContext, loggerFactory, retryForAvailability);
}
}
}
public async Task <int> SaveChangesAsync()
{
return(await _restfulContext.SaveChangesAsync());
}