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Merge pull request #108 from dmfay/views
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,165 @@ | ||
| var _ = require("underscore")._; | ||
| var assert = require("assert"); | ||
| var util = require('util'); | ||
| var Where = require("./where"); | ||
| var ArgTypes = require("./arg_types"); | ||
| var DA = require("deasync"); | ||
|
|
||
| /** | ||
| * Represents a queryable database entity (table or view). | ||
| * @param {[type]} args [description] | ||
| */ | ||
| var Queryable = function(args) { | ||
| this.schema = args.schema; | ||
| this.name = args.name; | ||
| this.db = args.db; | ||
|
|
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| // create delimited names now instead of at query time | ||
| this.delimitedName = "\"" + this.name + "\""; | ||
| this.delimitedSchema = "\"" + this.schema + "\""; | ||
|
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||
| // handle naming when schema is other than public: | ||
| if(this.schema !== "public") { | ||
| this.fullname = this.schema + "." + this.name; | ||
| this.delimitedFullName = this.delimitedSchema + "." + this.delimitedName; | ||
| } else { | ||
| this.fullname = this.name; | ||
| this.delimitedFullName = this.delimitedName; | ||
| } | ||
| }; | ||
|
|
||
| //a simple alias for returning a single record | ||
| Queryable.prototype.findOne = function(args, next){ | ||
| if(_.isFunction(args)){ | ||
| next = args; | ||
| args = {}; | ||
| } | ||
|
|
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| this.find(args, function(err,results){ | ||
| if(err){ | ||
| next(err,null); | ||
| }else{ | ||
| var result; | ||
|
|
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| if (_.isArray(results)) { | ||
| if (results.length > 0) { result = results[0]; } | ||
| } else { | ||
| result = results; | ||
| } | ||
|
|
||
| next(null,result); | ||
| } | ||
| }); | ||
| }; | ||
| Queryable.prototype.findOneSync = DA(Queryable.prototype.findOne); | ||
|
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| /** | ||
| * Counts rows and calls back with any error and the total. There are two ways to use this method: | ||
| * | ||
| * 1. find() style: db.mytable.count({field: value}, callback); | ||
| * 2. where() style: db.mytable.count("field=$1", [value], callback); | ||
| */ | ||
| Queryable.prototype.count = function() { | ||
| var args; | ||
| var where; | ||
|
|
||
| if (_.isObject(arguments[0])) { | ||
| args = ArgTypes.findArgs(arguments); | ||
| where = _.isEmpty(args.conditions) ? {where : " "} : Where.forTable(args.conditions); | ||
| } else { | ||
| args = ArgTypes.whereArgs(arguments); | ||
| where = {where: " where " + args.where}; | ||
| } | ||
|
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||
| var sql = "select COUNT(1) from " + this.delimitedFullName + where.where; | ||
|
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| this.db.query(sql, where.params || args.params, {single : true}, function(err, res) { | ||
| if (err) args.next(err, null); | ||
| else args.next(null, res.count); | ||
| }); | ||
| }; | ||
| Queryable.prototype.countSync = DA(Queryable.prototype.count); | ||
|
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||
| //a simple way to just run something | ||
| //just pass in "id=$1" and the criteria | ||
| Queryable.prototype.where = function(){ | ||
| var args = ArgTypes.whereArgs(arguments); | ||
|
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| var sql = "select * from " + this.delimitedFullName + " where " + args.where; | ||
| this.db.query(sql, args.params, args.next); | ||
| }; | ||
| Queryable.prototype.whereSync = DA(Queryable.prototype.where); | ||
|
|
||
| Queryable.prototype.find = function(){ | ||
| var args = ArgTypes.findArgs(arguments); | ||
|
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| //set default options | ||
| //if our inheriting object defines a primary key use that as the default order | ||
| args.options.order = args.options.order || (this.hasOwnProperty("pk") ? util.format('"%s"', this.pk) : "1"); | ||
| args.options.limit = args.options.limit || "1000"; | ||
| args.options.offset = args.options.offset || "0"; | ||
| args.options.columns = args.options.columns || "*"; | ||
|
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| if(_.isFunction(args.conditions)){ | ||
| //this is our callback as the only argument, caught by Args.ANY | ||
| args.next = args.conditions; | ||
| } | ||
|
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| var returnSingle = false; | ||
| var where, order, limit, cols="*", offset; | ||
|
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| if(args.options.columns){ | ||
| if(_.isArray(args.options.columns)){ | ||
| cols = args.options.columns.join(','); | ||
| }else{ | ||
| cols = args.options.columns; | ||
| } | ||
| } | ||
| order = " order by " + args.options.order; | ||
| limit = " limit " + args.options.limit; | ||
| offset = " offset " + args.options.offset; | ||
|
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| if(_.isNumber(args.conditions)){ | ||
| //a primary key search | ||
| var newArgs = {}; | ||
| newArgs[this.primaryKeyName()] = args.conditions; | ||
| args.conditions = newArgs; | ||
| returnSingle = true; | ||
| } | ||
|
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| where = _.isEmpty(args.conditions) ? {where : " "} : Where.forTable(args.conditions); | ||
|
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| var sql = "select " + cols + " from " + this.delimitedFullName + where.where + order + limit + offset; | ||
|
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| if (args.options.stream) { | ||
| this.db.stream(sql, where.params, null, args.next); | ||
| } else { | ||
| this.db.query(sql, where.params, {single : returnSingle}, args.next); | ||
| } | ||
| }; | ||
| Queryable.prototype.findSync = DA(Queryable.prototype.find); | ||
|
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| Queryable.prototype.search = function(args, next){ | ||
| //search expects a columns array and the term | ||
| assert(args.columns && args.term, "Need columns as an array and a term string"); | ||
|
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| if(!_.isArray(args.columns)){ | ||
| args.columns = [args.columns]; | ||
| } | ||
|
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| var tsv; | ||
| var vectorFormat = 'to_tsvector("%s")'; | ||
| if(args.columns.length === 1){ | ||
| tsv = util.format("%s", args.columns[0]); | ||
| }else{ | ||
| vectorFormat = 'to_tsvector(%s)'; | ||
| tsv= util.format("concat('%s')", args.columns.join(", ', '")); | ||
| } | ||
| var sql = "select * from " + this.delimitedFullName + " where " + util.format(vectorFormat, tsv); | ||
| sql+= " @@ to_tsquery($1);"; | ||
|
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| this.db.query(sql, [args.term],next); | ||
| }; | ||
| Queryable.prototype.searchSync = DA(Queryable.prototype.search); | ||
|
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||
| module.exports = Queryable; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,20 @@ | ||
| -- REQUIRES THREE ARGUMENTS: | ||
| -- $1, $2, $2 all must be empty string, or comma-delimited string, or array of string: | ||
| select v.table_schema as schema, v.table_name as name | ||
| from information_schema.views v | ||
| where v.table_schema <> 'pg_catalog' and v.table_schema <> 'information_schema' and ( | ||
| (case -- allow specific schemas (none or '' assumes all): | ||
| when $1 ='' then 1=1 | ||
| else v.table_schema = any(string_to_array(replace($1, ' ', ''), ',')) end) | ||
| and | ||
| (case -- blacklist tables using LIKE by fully-qualified name (no schema assumes public): | ||
| when $2 = '' then 1=1 | ||
| else replace((v.table_schema || '.'|| v.table_name), 'public.', '') not like all(string_to_array(replace($2, ' ', ''), ',')) end) | ||
| ) or ( | ||
| case -- make exceptions for specific tables, with fully-qualified name or wildcard pattern (no schema assumes public). | ||
| when $3 = '' then 1=0 | ||
| -- Below can use '%' as wildcard. Change 'like' to '=' to require exact names: | ||
| else replace((v.table_schema || '.'|| v.table_name), 'public.', '') like any(string_to_array(replace($3, ' ', ''), ',')) end | ||
| ) | ||
| order by v.table_schema, | ||
| v.table_name; |
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