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query-generator.js.html 116 KB
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ctx-type">declaration</div><h1 id="Utils">Utils</h1><h5 class="subheader">Utils</h5><div class="tags"><ul class="no-bullet"></ul></div><div class="description"></div><pre><code class="language-javascript">var Utils = require(&quot;../../utils&quot;)
  , util  = require(&quot;util&quot;)
  , DataTypes = require(&quot;../../data-types&quot;)
  , tables = {}
  , primaryKeys = {};

function removeQuotes(s, quoteChar) {
  quoteChar = quoteChar || '&quot;'
  return s.replace(new RegExp(quoteChar, 'g'), '')
}

function addQuotes(s, quoteChar) {
  quoteChar = quoteChar || '&quot;'
  return removeQuotes(s, quoteChar)
    .split('.')
    .map(function(e) { return quoteChar + String(e) + quoteChar })
    .join('.')
}

function pgEscape(val) {
  if (val === undefined || val === null) {
    return 'NULL';
  }

  switch (typeof val) {
    case 'boolean': return (val) ? 'true' : 'false';
    case 'number': return val+'';
  }

  if (val instanceof Date) {
    val = pgSqlDate(val);
  }

  // http://www.postgresql.org/docs/8.2/static/sql-syntax-lexical.html#SQL-SYNTAX-STRINGS
  val = val.replace(/'/g, &quot;''&quot;);
  return &quot;'&quot;+val+&quot;'&quot;;
}

function pgEscapeAndQuote(val) {
  return addQuotes(removeQuotes(pgEscape(val), &quot;'&quot;))
}

function pgEnum(tableName, attr, dataType) {
  var enumName = pgEscapeAndQuote(&quot;enum_&quot; + tableName + &quot;_&quot; + attr)
  return &quot;DROP TYPE IF EXISTS &quot; + enumName + &quot;; CREATE TYPE &quot; + enumName + &quot; AS &quot; + dataType.match(/^ENUM\(.+\)/)[0] + &quot;; &quot;
}

function padInt(i) {
  return (i &lt; 10) ? '0' + i.toString() : i.toString()
}
function pgSqlDate(dt) {
  var date = [ dt.getUTCFullYear(), padInt(dt.getUTCMonth()+1), padInt(dt.getUTCDate()) ].join('-')
  var time = [ dt.getUTCHours(), padInt(dt.getUTCMinutes()), padInt(dt.getUTCSeconds())].join(':')
  return date + ' ' + time + '.' + ((dt.getTime() % 1000) * 1000)
}

function pgDataTypeMapping(tableName, attr, dataType) {
  if (Utils._.includes(dataType, 'PRIMARY KEY')) {
    primaryKeys[tableName].push(attr)
    dataType = dataType.replace(/PRIMARY KEY/, '')
  }

  if (Utils._.includes(dataType, 'TINYINT(1)')) {
    dataType = dataType.replace(/TINYINT\(1\)/, 'BOOLEAN')
  }

  if (Utils._.includes(dataType, 'DATETIME')) {
    dataType = dataType.replace(/DATETIME/, 'TIMESTAMP')
  }

  if (Utils._.includes(dataType, 'SERIAL')) {
    dataType = dataType.replace(/INTEGER/, '')
    dataType = dataType.replace(/NOT NULL/, '')
    tables[tableName][attr] = 'serial'
  }

  if (dataType.match(/^ENUM\(/)) {
    dataType = dataType.replace(/^ENUM\(.+\)/, pgEscapeAndQuote(&quot;enum_&quot; + tableName + &quot;_&quot; + attr))
  }

  return dataType
}

module.exports = (function() {
  var QueryGenerator = {
    options: {},

    createTableQuery: function(tableName, attributes, options) {
      options = Utils._.extend({
      }, options || {})

      primaryKeys[tableName] = []
      tables[tableName] = {}

      var query   = &quot;CREATE TABLE IF NOT EXISTS &lt;%= table %&gt; (&lt;%= attributes%&gt;)&quot;
        , attrStr = []

      for (var attr in attributes) {
        var dataType = pgDataTypeMapping(tableName, attr, attributes[attr])
        attrStr.push(addQuotes(attr) + &quot; &quot; + dataType)

        if (attributes[attr].match(/^ENUM\(/)) {
          query = pgEnum(tableName, attr, attributes[attr]) + query;
        }
      }

      var values  = {
        table: addQuotes(tableName),
        attributes: attrStr.join(&quot;, &quot;),
      }

      var pks = primaryKeys[tableName].map(function(pk){ return addQuotes(pk) }).join(&quot;,&quot;)
      if (pks.length &gt; 0) {
        values.attributes += &quot;, PRIMARY KEY (&quot; + pks + &quot;)&quot;
      }

      return Utils._.template(query)(values).trim() + &quot;;&quot;
    },

    dropTableQuery: function(tableName, options) {
      options = options || {}
      var query = &quot;DROP TABLE IF EXISTS &lt;%= table %&gt;;&quot;
      return Utils._.template(query)({ table: addQuotes(tableName) })
    },

    renameTableQuery: function(before, after) {
      var query = &quot;ALTER TABLE &lt;%= before %&gt; RENAME TO &lt;%= after %&gt;;&quot;
      return Utils._.template(query)({ before: addQuotes(before), after: addQuotes(after) })
    },

    showTablesQuery: function() {
      return &quot;SELECT table_name FROM information_schema.tables WHERE table_schema = 'public';&quot;
    },

    describeTableQuery: function(tableName) {
      var query = 'SELECT column_name as &quot;Field&quot;, column_default as &quot;Default&quot;, is_nullable as &quot;Null&quot;, data_type as &quot;Type&quot; FROM information_schema.columns WHERE table_name = &lt;%= table %&gt;;'
      return Utils._.template(query)({ table: addQuotes(tableName, &quot;'&quot;) })
    },

    addColumnQuery: function(tableName, attributes) {
      var query      = &quot;ALTER TABLE &lt;%= tableName %&gt; ADD COLUMN &lt;%= attributes %&gt;;&quot;
        , attrString = []

      for (var attrName in attributes) {
        var definition = attributes[attrName]

        attrString.push(Utils._.template('&lt;%= attrName %&gt; &lt;%= definition %&gt;')({
          attrName: addQuotes(attrName),
          definition: pgDataTypeMapping(tableName, attrName, definition)
        }))

        if (definition.match(/^ENUM\(/)) {
          query = pgEnum(tableName, attrName, definition) + query
        }
      }

      return Utils._.template(query)({ tableName: addQuotes(tableName), attributes: attrString.join(', ') })
    },

    removeColumnQuery: function(tableName, attributeName) {
      var query = &quot;ALTER TABLE &lt;%= tableName %&gt; DROP COLUMN &lt;%= attributeName %&gt;;&quot;
      return Utils._.template(query)({ tableName: addQuotes(tableName), attributeName: addQuotes(attributeName) })
    },

    changeColumnQuery: function(tableName, attributes) {
      var query = &quot;ALTER TABLE &lt;%= tableName %&gt; ALTER COLUMN &lt;%= query %&gt;;&quot;
        , sql   = []

      for (var attributeName in attributes) {
        var definition = attributes[attributeName]
        var attrSql = ''

        if (definition.indexOf('NOT NULL') &gt; 0) {
          attrSql += Utils._.template(query)({
            tableName: addQuotes(tableName),
            query: addQuotes(attributeName) + ' SET NOT NULL'
          })
          definition = definition.replace('NOT NULL', '').trim()
        } else {
          attrSql += Utils._.template(query)({
            tableName: addQuotes(tableName),
            query: addQuotes(attributeName) + ' DROP NOT NULL'
          })
        }

        if (definition.match(/^ENUM\(/)) {
          query = pgEnum(tableName, attributeName, definition) + query
          definition = definition.replace(/^ENUM\(.+\)/, Utils.escape(&quot;enum_&quot; + tableName + &quot;_&quot; + attributeName))
        }

        attrSql += Utils._.template(query)({
          tableName: addQuotes(tableName),
          query: addQuotes(attributeName) + ' TYPE ' + definition
        })

        sql.push(attrSql)
      }

      return sql.join('')
    },

    renameColumnQuery: function(tableName, attrBefore, attributes) {
      var query      = &quot;ALTER TABLE &lt;%= tableName %&gt; RENAME COLUMN &lt;%= attributes %&gt;;&quot;
      var attrString = []

      for (var attributeName in attributes) {
        attrString.push(Utils._.template('&lt;%= before %&gt; TO &lt;%= after %&gt;')({
          before: addQuotes(attrBefore),
          after: addQuotes(attributeName),
        }))
      }

      return Utils._.template(query)({ tableName: addQuotes(tableName), attributes: attrString.join(', ') })
    },

    selectQuery: function(tableName, options) {
      var query = &quot;SELECT &lt;%= attributes %&gt; FROM &lt;%= table %&gt;&quot;
        , table = null

      options = options || {}
      options.table = table = Array.isArray(tableName) ? tableName.map(function(t){return addQuotes(t);}).join(&quot;, &quot;) : addQuotes(tableName)
      options.attributes = options.attributes &amp;&amp; options.attributes.map(function(attr) {
        if (Array.isArray(attr) &amp;&amp; attr.length === 2) {
          return [attr[0], addQuotes(removeQuotes(attr[1], '`'))].join(' as ')
        } else if (attr.indexOf('`') &gt;= 0) {
          return attr.replace(/`/g, '&quot;')
        } else {
          return addQuotes(attr)
        }
      }).join(&quot;, &quot;)
      options.attributes = options.attributes || '*'

      if (options.include) {
        var optAttributes = [options.table + '.*']

        for (var daoName in options.include) {
          if (options.include.hasOwnProperty(daoName)) {
            var dao         = options.include[daoName]
              , daoFactory  = dao.daoFactoryManager.getDAO(tableName, {
                  attribute: 'tableName'
                })
              , _tableName  = addQuotes(dao.tableName)
              , association = dao.getAssociation(daoFactory)

            if (association.connectorDAO) {
              var foreignIdentifier = Object.keys(association.connectorDAO.rawAttributes).filter(function(attrName) {
                return (!!attrName.match(/.+Id$/) || !!attrName.match(/.+_id$/)) &amp;&amp; (attrName !== association.identifier)
              })[0]

              query += ' LEFT OUTER JOIN ' + addQuotes(association.connectorDAO.tableName) + ' ON '
              query += addQuotes(association.connectorDAO.tableName) + '.'
              query += addQuotes(foreignIdentifier) + '='
              query += addQuotes(table) + '.' + addQuotes('id')

              query += ' LEFT OUTER JOIN ' + addQuotes(dao.tableName) + ' ON '
              query += addQuotes(dao.tableName) + '.'
              query += addQuotes('id') + '='
              query += addQuotes(association.connectorDAO.tableName) + '.' + addQuotes(association.identifier)
            } else {
              query += ' LEFT OUTER JOIN ' + addQuotes(dao.tableName) + ' ON '
              query += addQuotes(association.associationType === 'BelongsTo' ? dao.tableName : tableName) + '.'
              query += addQuotes(association.identifier) + '='
              query += addQuotes(association.associationType === 'BelongsTo' ? tableName : dao.tableName) + '.' + addQuotes('id')
            }

            var aliasAssoc = daoFactory.getAssociationByAlias(daoName)
              , aliasName  = !!aliasAssoc ? addQuotes(daoName) : _tableName

            optAttributes = optAttributes.concat(
              Object.keys(dao.attributes).map(function(attr) {
                return '' +
                  [_tableName, addQuotes(attr)].join('.') +
                  ' AS &quot;' +
                  removeQuotes([aliasName, attr].join('.')) + '&quot;'
              })
            )
          }
        }

        options.attributes = optAttributes.join(', ')
      }

      if(options.where) {
        options.where = QueryGenerator.getWhereConditions(options.where)
        query += &quot; WHERE &lt;%= where %&gt;&quot;
      }

      if(options.order) {
        options.order = options.order.replace(/([^ ]+)(.*)/, function(m, g1, g2) { return addQuotes(g1)+g2 })
        query += &quot; ORDER BY &lt;%= order %&gt;&quot;
      }

      if(options.group) {
        options.group = addQuotes(options.group)
        query += &quot; GROUP BY &lt;%= group %&gt;&quot;
      }

      if (!(options.include &amp;&amp; (options.limit === 1))) {
        if (options.limit) {
          query += &quot; LIMIT &lt;%= limit %&gt;&quot;
        }

        if (options.offset) {
          query += &quot; OFFSET &lt;%= offset %&gt;&quot;
        }
      }

      query += &quot;;&quot;

      return Utils._.template(query)(options)
    },

    insertQuery: function(tableName, attrValueHash) {
      attrValueHash = Utils.removeNullValuesFromHash(attrValueHash, this.options.omitNull)

      var query     = &quot;INSERT INTO &lt;%= table %&gt; (&lt;%= attributes %&gt;) VALUES (&lt;%= values %&gt;) RETURNING *;&quot;
        , returning = []

      Utils._.forEach(attrValueHash, function(value, key, hash) {
        if (tables[tableName] &amp;&amp; tables[tableName][key]) {
          switch (tables[tableName][key]) {
            case 'serial':
              delete hash[key]
              returning.push(key)
              break
          }
        }
      });

      var replacements  = {
        table: addQuotes(tableName),
        attributes: Object.keys(attrValueHash).map(function(attr){return addQuotes(attr)}).join(&quot;,&quot;),
        values: Utils._.values(attrValueHash).map(function(value){
          return pgEscape(value)
        }).join(&quot;,&quot;)
      }

      return Utils._.template(query)(replacements)
    },

    updateQuery: function(tableName, attrValueHash, where) {
      attrValueHash = Utils.removeNullValuesFromHash(attrValueHash, this.options.omitNull)

      var query  = &quot;UPDATE &lt;%= table %&gt; SET &lt;%= values %&gt; WHERE &lt;%= where %&gt; RETURNING *&quot;
        , values = []

      for (var key in attrValueHash) {
        var value = attrValueHash[key]
        values.push(addQuotes(key) + &quot;=&quot; + pgEscape(value))
      }

      var replacements = {
        table: addQuotes(tableName),
        values: values.join(&quot;,&quot;),
        where: QueryGenerator.getWhereConditions(where)
      }

      return Utils._.template(query)(replacements)
    },

    deleteQuery: function(tableName, where, options) {
      options = options || {}
      options.limit = options.limit || 1

      primaryKeys[tableName] = primaryKeys[tableName] || [];

      var query = &quot;DELETE FROM &lt;%= table %&gt; WHERE &lt;%= primaryKeys %&gt; IN (SELECT &lt;%= primaryKeysSelection %&gt; FROM &lt;%= table %&gt; WHERE &lt;%= where %&gt; LIMIT &lt;%= limit %&gt;)&quot;

      var pks;
      if (primaryKeys[tableName] &amp;&amp; primaryKeys[tableName].length &gt; 0) {
        pks = primaryKeys[tableName].map(function(pk) { return addQuotes(pk) }).join(',')
      } else {
        pks = addQuotes('id')
      }

      var replacements = {
        table: addQuotes(tableName),
        where: QueryGenerator.getWhereConditions(where),
        limit: pgEscape(options.limit),
        primaryKeys: primaryKeys[tableName].length &gt; 1 ? '(' + pks + ')' : pks,
        primaryKeysSelection: pks
      }

      return Utils._.template(query)(replacements)
    },

    addIndexQuery: function(tableName, attributes, options) {
      var transformedAttributes = attributes.map(function(attribute) {
        if (typeof attribute === 'string') {
          return addQuotes(attribute)
        } else {
          var result = &quot;&quot;

          if (!attribute.attribute) {
            throw new Error('The following index attribute has no attribute: ' + util.inspect(attribute))
          }

          result += addQuotes(attribute.attribute)

          if (attribute.length) {
            result += '(' + attribute.length + ')'
          }

          if (attribute.order) {
            result += ' ' + attribute.order
          }

          return result
        }
      })

      var onlyAttributeNames = attributes.map(function(attribute) {
        return (typeof attribute === &quot;string&quot;) ? attribute : attribute.attribute
      })

      var indexTable = tableName.split('.')
      options = Utils._.extend({
        indicesType: null,
        indexName: Utils._.underscored(indexTable[indexTable.length-1] + '_' + onlyAttributeNames.join('_')),
        parser: null
      }, options || {})

      return Utils._.compact([
        &quot;CREATE&quot;, options.indicesType, &quot;INDEX&quot;, addQuotes(options.indexName),
        (options.indexType ? ('USING ' + options.indexType) : undefined),
        &quot;ON&quot;, addQuotes(tableName), '(' + transformedAttributes.join(', ') + ')'
      ]).join(' ')
    },

    showIndexQuery: function(tableName, options) {
      var query = &quot;SELECT relname FROM pg_class WHERE oid IN ( SELECT indexrelid FROM pg_index, pg_class WHERE pg_class.relname='&lt;%= tableName %&gt;' AND pg_class.oid=pg_index.indrelid);&quot;
      return Utils._.template(query)({ tableName: tableName });
    },

    removeIndexQuery: function(tableName, indexNameOrAttributes) {
      var sql       = &quot;DROP INDEX IF EXISTS &lt;%= indexName %&gt;&quot;
        , indexName = indexNameOrAttributes

      if (typeof indexName !== &quot;string&quot;) {
        indexName = Utils._.underscored(tableName + '_' + indexNameOrAttributes.join('_'))
      }

      return Utils._.template(sql)({ tableName: addQuotes(tableName), indexName: addQuotes(indexName) })
    },

    getWhereConditions: function(smth) {
      var result = null

      if (Utils.isHash(smth)) {
        result = QueryGenerator.hashToWhereConditions(smth)
      }
      else if (typeof smth === &quot;number&quot;) {
        result = '\&quot;id\&quot;' + &quot;=&quot; + pgEscape(smth)
      }
      else if (typeof smth === &quot;string&quot;) {
        result = smth
      }
      else if (Array.isArray(smth)) {
        result = Utils.format(smth)
      }

      return result
    },

    hashToWhereConditions: function(hash) {
      var result = []

      for (var key in hash) {
        var value = hash[key]

        //handle qualified key names
        var _key   = key.split('.').map(function(col){return addQuotes(col)}).join(&quot;.&quot;)
          , _value = null

        if (Array.isArray(value)) {
          if (value.length == 0) { value = [null] }
          _value = &quot;(&quot; + value.map(function(subValue) {
            return pgEscape(subValue);
          }).join(',') + &quot;)&quot;

          result.push([_key, _value].join(&quot; IN &quot;))
        }
        else if ((value) &amp;&amp; (typeof value === &quot;object&quot;)) {
          //using as sentinel for join column =&gt; value
          _value = value.join.split('.').map(function(col){return addQuotes(col)}).join(&quot;.&quot;)
          result.push([_key, _value].join(&quot;=&quot;))
        } else {
          _value = pgEscape(value)
          result.push((_value == 'NULL') ? _key + &quot; IS NULL&quot; : [_key, _value].join(&quot;=&quot;))
        }
      }

      return result.join(' AND ')
    },

    attributesToSQL: function(attributes) {
      var result = {}

      for (var name in attributes) {
        var dataType = attributes[name]

        if(Utils.isHash(dataType)) {
          var template     = &quot;&lt;%= type %&gt;&quot;
            , replacements = { type: dataType.type }

          if (dataType.type === DataTypes.ENUM &amp;&amp; Array.isArray(dataType.values) &amp;&amp; dataType.values.length &gt; 0) {
            replacements.type = &quot;ENUM(&quot; + Utils._.map(dataType.values, function(value) {
              return Utils.escape(value)
            }).join(&quot;, &quot;) + &quot;)&quot;
          }

          if (dataType.type === &quot;TINYINT(1)&quot;) {
            dataType.type = 'BOOLEAN'
          }

          if (dataType.type === &quot;DATETIME&quot;) {
            dataType.type = 'TIMESTAMP'
          }

          if (dataType.hasOwnProperty('allowNull') &amp;&amp; (!dataType.allowNull)) {
            template += &quot; NOT NULL&quot;
          }

          if (dataType.autoIncrement) {
            template +=&quot; SERIAL&quot;
          }

          if (dataType.defaultValue !== undefined) {
            template += &quot; DEFAULT &lt;%= defaultValue %&gt;&quot;
            replacements.defaultValue = pgEscape(dataType.defaultValue)
          }

          if (dataType.unique) {
            template += &quot; UNIQUE&quot;
          }

          if (dataType.primaryKey) {
            template += &quot; PRIMARY KEY&quot;
          }

          result[name] = Utils._.template(template)(replacements)
        } else {
          result[name] = dataType
        }
      }

      return result
    },

    findAutoIncrementField: function(factory) {
      var fields = []

      for (var name in factory.attributes) {
        var definition = factory.attributes[name]

        if (definition &amp;&amp; (definition.indexOf('SERIAL') &gt; -1)) {
          fields.push(name)
        }
      }

      return fields
    },

    databaseConnectionUri: function(config) {
      var template = '&lt;%= protocol %&gt;://&lt;%= user %&gt;:&lt;%= password %&gt;@&lt;%= host %&gt;&lt;% if(port) { %&gt;:&lt;%= port %&gt;&lt;% } %&gt;/&lt;%= database %&gt;';

      return Utils._.template(template)({
        user: encodeURIComponent(config.username),
        password: encodeURIComponent(config.password),
        database: config.database,
        host: config.host,
        port: config.port,
        protocol: config.protocol
      })
    }
  }

  return Utils._.extend(Utils._.clone(require(&quot;../query-generator&quot;)), QueryGenerator)
})()</code></pre></div></div></div><!-- Foundation JS--><script src="http://cdnjs.cloudflare.com/ajax/libs/foundation/3.2.2/javascripts/foundation.min.js"></script><script>/**
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