1
Error (E_UNKNOWN) :: Encountered an unexpected error
: Trying to define a collection (external_resource) which already exists.
我试图创建现有数据库的模型。我不使用帆。只需水线独立。我有连接设置迁移安全。但是，waterline仍在尝试创建已存在于我的预先存在的数据库中的表。如果我让tableName成为一个新名字，它就可以正常工作。这个问题似乎是我尝试使用现有表中的现有数据，然后为其创建水线模型。水线现有的数据库迁移到水线车型无帆
我相信这是一个错误，因为迁移安全不应该试图创建一个表的所有权利？
我正在使用没有风帆的水线。
水线被配置是这样的：
```
models = [];
fs.readdirSync(HOMEDIR + '/lib/models/waterline').forEach(function(file) {
models.push(require(HOMEDIR + '/lib/models/waterline/' + file));
});
module.exports = {
init: function(next) {
models.forEach(function(model) {
orm.loadCollection(model);
});
orm.initialize(config, function(err, models) {
if (err) throw err;
global.models = models.collections;
global.connections = models.connections;
next();
});
}
};
//And this in my config
localhost: {
migrate: 'safe',
adapter: 'postgres',
database: 'intellinote',
host: 'localhost',
user: 'postgres',
password: '',
port: 5432
}
```
使用帆-的PostgreSQL的方式。 “sails-postgresql”：“^ 0.11.4”，
我的一个假设是我的模型定义完全不符合我的postgresql模型。我试图做到这一点，但也许我错过了一些小事。在水线代码中它检查模型==模式定义？也许如果我知道这一点，我可以找到为什么这是试图做一个创建
3年的用户航行。在数十亿的公司:(
在此先感谢主要生产水平的bug
更多信息：在SQL看起来像这样的表
```
DROP TABLE IF EXISTS "intellinotedb"."external_resource";
CREATE TABLE "intellinotedb"."external_resource" (
"id" int8 NOT NULL DEFAULT nextval('external_resource_id_seq'::regclass),
"external_id" varchar(2000) NOT NULL COLLATE "default",
"version_id" varchar(2000) COLLATE "default",
"url" varchar(5000) COLLATE "default",
"name" varchar(4000) COLLATE "default",
"size" int8,
"creator" varchar(50) NOT NULL COLLATE "default",
"created_at" timestamp(6) NOT NULL DEFAULT now(),
"modified_at" timestamp(6) NULL,
"project_id" int8 NOT NULL,
"note_id" int8,
"type" varchar(50) NOT NULL COLLATE "default",
"is_public" bool NOT NULL DEFAULT false,
"state" varchar(100) NOT NULL DEFAULT 'ACTIVE'::character varying COLLATE "default",
"mime_type" text COLLATE "default",
"internal_type" text COLLATE "default",
"is_template" bool NOT NULL,
"has_filled_data" bool NOT NULL
)
WITH (OIDS=FALSE);
ALTER TABLE "intellinotedb"."external_resource" OWNER TO "intellinote";
-- ----------------------------
-- Primary key structure for table external_resource
-- ----------------------------
ALTER TABLE "intellinotedb"."external_resource" ADD PRIMARY KEY ("id") NOT DEFERRABLE INITIALLY IMMEDIATE;
-- ----------------------------
-- Uniques structure for table external_resource
-- ----------------------------
ALTER TABLE "intellinotedb"."external_resource" ADD CONSTRAINT "external_resource_note_id_key" UNIQUE ("note_id") NOT DEFERRABLE INITIALLY IMMEDIATE;
-- ----------------------------
-- Foreign keys structure for table external_resource
-- ----------------------------
ALTER TABLE "intellinotedb"."external_resource" ADD CONSTRAINT "external_resource_note_id_fkey" FOREIGN KEY ("note_id") REFERENCES "intellinotedb"."note" ("id") ON UPDATE NO ACTION ON DELETE CASCADE NOT DEFERRABLE INITIALLY IMMEDIATE;
ALTER TABLE "intellinotedb"."external_resource" ADD CONSTRAINT "external_resource_project_id_fkey" FOREIGN KEY ("project_id") REFERENCES "intellinotedb"."project" ("id") ON UPDATE NO ACTION ON DELETE NO ACTION NOT DEFERRABLE INITIALLY IMMEDIATE;
```
而且我的模型：
```
Waterline = require('waterline');
module.exports = Waterline.Collection.extend({
tableName: 'external_resource',
meta: {
schemaName: process.env.WATERLINE_SCHEMA || 'intellinotedb'
},
connection: process.env.WATERLINE_DB || 'localhost',
attributes: {
id: {
type: 'integer',
autoIncrement: true,
primaryKey: true,
unique: true,
size: 8
},
external_id: {
type: 'string',
required: true,
size: 2000
},
version_id: {
type: 'string',
size: 2000
},
url: {
type: 'string',
required: true,
size: 5000
},
name: {
type: 'string',
required: true,
size: 4000
},
size: {
type: 'integer',
required: true,
size: 8
},
creator: {
type: 'string',
required: true,
size: 50
},
createdAt: {
type: 'datetime',
columnName: 'created_at'
},
updatedAt: {
type: 'datetime',
columnName: 'modified_at'
},
project_id: {
type: 'integer',
required: true
},
note_id: {
type: 'integer',
required: true,
size: 8
},
type: {
type: 'string',
defaultsTo: 'FILE',
required: true,
size: 50
},
is_public: {
type: 'boolean',
defaultsTo: true,
required: true
},
state: {
type: 'string',
enum: ['ACTIVE', 'DELETED'],
defaultsTo: 'ACTIVE',
required: true,
size: 100
},
mime_type: {
type: 'string',
required: true
},
internal_type: {
type: 'string',
defaultsTo: 'REGULAR',
required: true
},
is_template: {
type: 'boolean',
defaultsTo: false,
required: false
},
has_filled_data: {
type: 'boolean',
defaultsTo: false,
required: false
}
}
});
```