annotate framework/env/param/update.lua @ 409:ebe9416db4e0
Added missing mondelefant_cleanup(conn) call for previous commit in __gc metamethod
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jbe |
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Thu Jan 07 01:26:11 2016 +0100 (2016-01-07) |
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9fdfb27f8e67 |
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1 --[[--
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2 param.update(
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3 record, -- database record to be updated
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4 key_and_field_name1, -- name of CGI parameter and record field
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5 key_and_field_name2, -- another name of a CGI parameter and record field
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6 {
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7 key3, -- name of CGI parameter
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8 field_name3 -- name of record field
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9 }
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10 )
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11
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12 This function can update several fields of a database record using GET/POST request parameters (or internal/exchanged parameters). The type of each parameter is automatically determined by the class of the record (_class:get_colums()[field].type).
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13 --]]--
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14
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15 function param.update(record, mapping_info, ...)
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16 if not mapping_info then
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17 return
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18 end
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19 assert(record, "No record given for param.update(...).")
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20 assert(record._class, "Record passed to param.update(...) has no _class attribute.")
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21 local key, field_name
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22 if type(mapping_info) == "string" then
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23 key = mapping_info
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24 field_name = mapping_info
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25 else
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26 key = mapping_info[1]
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27 field_name = mapping_info[2]
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28 end
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29 assert(key, "No key given in parameter of param.update(...).")
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30 assert(field_name, "No field name given in parameter of param.update(...).")
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31 local column_info = record._class:get_columns()[field_name]
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32 if not column_info then
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33 error('Type of column "' .. field_name .. '" is unknown.')
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34 end
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35 local new_value = param.get(key, column_info.type)
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36 if new_value ~= record[field_name] then
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37 record[field_name] = new_value
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38 end
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39 return param.update(record, ...) -- recursivly process following arguments
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40 end
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