hunk.code_window:             if (dataSource) await dataSource.destroy()
               PlatformTools.logCmdErr("Error during schema synchronization:", err)
               process.exit(1)
           }
       }
   }
hunk.labels: keep keep replace keep keep keep keep
hunk.file_path: src/commands/SchemaSyncCommand.ts
hunk.type: replace
file: import { EmbeddedMetadata } from "./EmbeddedMetadata"
  import { EntityMetadata } from "./EntityMetadata"
  import { NamingStrategyInterface } from "../naming-strategy/NamingStrategyInterface"
  import { ColumnMetadata } from "./ColumnMetadata"
  import { UniqueMetadataArgs } from "../metadata-args/UniqueMetadataArgs"
  import { TypeORMError } from "../error"
  import { DeferrableType } from "./types/DeferrableType"
  
  /**
   * Unique metadata contains all information about table's unique constraints.
   */
  export class UniqueMetadata {
      // ---------------------------------------------------------------------
      // Public Properties
      // ---------------------------------------------------------------------
  
      /**
       * Entity metadata of the class to which this unique constraint is applied.
       */
      entityMetadata: EntityMetadata
  
      /**
       * Embedded metadata if this unique was applied on embedded.
       */
      embeddedMetadata?: EmbeddedMetadata
  
      /**
       * Target class to which metadata is applied.
       */
      target?: Function | string
  
      /**
       * Unique columns.
       */
      columns: ColumnMetadata[] = []
  
      /**
       * Indicate if unique constraints can be deferred.
       */
      deferrable?: DeferrableType
  
      /**
       * User specified unique constraint name.
       */
      givenName?: string
  
      /**
       * User specified column names.
       */
      givenColumnNames?:
          | ((object?: any) => any[] | { [key: string]: number })
          | string[]
  
      /**
       * Final unique constraint name.
       * If unique constraint name was given by a user then it stores normalized (by naming strategy) givenName.
       * If unique constraint name was not given then its generated.
       */
      name: string
  
      /**
       * Map of column names with order set.
       * Used only by MongoDB driver.
       */
      columnNamesWithOrderingMap: { [key: string]: number } = {}
  
      // ---------------------------------------------------------------------
      // Constructor
      // ---------------------------------------------------------------------
  
      constructor(options: {
          entityMetadata: EntityMetadata
          embeddedMetadata?: EmbeddedMetadata
          columns?: ColumnMetadata[]
          args?: UniqueMetadataArgs
      }) {
          this.entityMetadata = options.entityMetadata
          this.embeddedMetadata = options.embeddedMetadata
          if (options.columns) this.columns = options.columns
  
          if (options.args) {
              this.target = options.args.target
              this.givenName = options.args.name
              this.givenColumnNames = options.args.columns
              this.deferrable = options.args.deferrable
          }
      }
  
      // ---------------------------------------------------------------------
      // Public Build Methods
      // ---------------------------------------------------------------------
  
      /**
       * Builds some depend unique constraint properties.
       * Must be called after all entity metadata's properties map, columns and relations are built.
       */
      build(namingStrategy: NamingStrategyInterface): this {
          const map: { [key: string]: number } = {}
  
          // if columns already an array of string then simply return it
          if (this.givenColumnNames) {
              let columnPropertyPaths: string[] = []
              if (Array.isArray(this.givenColumnNames)) {
                  columnPropertyPaths = this.givenColumnNames.map(
                      (columnName) => {
                          if (this.embeddedMetadata)
                              return (
                                  this.embeddedMetadata.propertyPath +
                                  "." +
                                  columnName
                              )
  
                          return columnName.trim()
                      },
                  )
                  columnPropertyPaths.forEach(
                      (propertyPath) => (map[propertyPath] = 1),
                  )
              } else {
                  // if columns is a function that returns array of field names then execute it and get columns names from it
                  const columnsFnResult = this.givenColumnNames(
                      this.entityMetadata.propertiesMap,
                  )
                  if (Array.isArray(columnsFnResult)) {
                      columnPropertyPaths = columnsFnResult.map((i: any) =>
                          String(i),
                      )
                      columnPropertyPaths.forEach((name) => (map[name] = 1))
                  } else {
                      columnPropertyPaths = Object.keys(columnsFnResult).map(
                          (i: any) => String(i),
                      )
                      Object.keys(columnsFnResult).forEach(
                          (columnName) =>
                              (map[columnName] = columnsFnResult[columnName]),
                      )
                  }
              }
  
              this.columns = columnPropertyPaths
                  .map((propertyName) => {
                      const columnWithSameName = this.entityMetadata.columns.find(
                          (column) => column.propertyPath === propertyName,
                      )
                      if (columnWithSameName) {
                          return [columnWithSameName]
                      }
                      const relationWithSameName =
                          this.entityMetadata.relations.find(
                              (relation) =>
                                  relation.isWithJoinColumn &&
                                  relation.propertyName === propertyName,
                          )
                      if (relationWithSameName) {
                          return relationWithSameName.joinColumns
                      }
                      const indexName = this.givenName
                          ? '"' + this.givenName + '" '
                          : ""
                      const entityName = this.entityMetadata.targetName
                      throw new TypeORMError(
                          `Unique constraint ${indexName}contains column that is missing in the entity (${entityName}): ` +
                              propertyName,
                      )
                  })
                  .reduce((a, b) => a.concat(b))
          }
  
          this.columnNamesWithOrderingMap = Object.keys(map).reduce(
              (updatedMap, key) => {
                  const column = this.entityMetadata.columns.find(
                      (column) => column.propertyPath === key,
                  )
                  if (column) updatedMap[column.databasePath] = map[key]
  
                  return updatedMap
              },
              {} as { [key: string]: number },
          )
  
          this.name = this.givenName
              ? this.givenName
              : namingStrategy.uniqueConstraintName(
                    this.entityMetadata.tableName,
                    this.columns.map((column) => column.databaseName),
                )
          return this
      }
  }
  