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annotate examples/blog/src/lib/Post.luan @ 1349:0cceff521abb

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IO error handling
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 27 Feb 2019 12:30:46 -0700
parents 4721c482c86b
children 709f7498a363
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ca169567ce07 module URIs must now include ".luan"
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1 local Luan = require "luan:Luan.luan"
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2 local error = Luan.error
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3 local ipairs = Luan.ipairs or error()
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4 local type = Luan.type or error()
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5 local Time = require "luan:Time.luan"
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6 local now = Time.now or error()
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7 local String = require "luan:String.luan"
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8 local trim = String.trim or error()
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9 local db = require("site:/lib/Db.luan").db or error()
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10
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11
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12 local Post = {}
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13
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14 local function from_doc(doc)
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15 return Post.new {
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16 id = doc.id
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17 subject = doc.subject
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18 content = doc.content
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19 date = doc.date
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20 }
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21 end
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22
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23 function Post.new(this)
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24 type(this.subject)=="string" or error "subject must be string"
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25 type(this.content)=="string" or error "content must be string"
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26 this.date = this.date or now()
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27
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28 function this.save()
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29 local doc = {
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30 type = "post"
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31 id = this.id
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32 subject = this.subject
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33 content = this.content
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34 date = this.date
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35 }
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36 db.save(doc)
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37 this.id = doc.id
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38 end
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39
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40 return this
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41 end
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42
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43 function Post.get_by_id(id)
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44 local doc = db.get_document("id:"..id)
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45 return doc and from_doc(doc)
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46 end
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47
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48 function Post.get_all()
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49 local docs = db.search("type:post",1,1000,"id desc")
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50 local posts = {}
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51 for _, doc in ipairs(docs) do
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52 posts[#posts+1] = from_doc(doc)
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53 end
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54 return posts
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55 end
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56
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57 function Post.search(query)
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58 query = trim(query)
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59 if #query == 0 then
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60 return Post.get_all()
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61 end
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62 local docs = db.search(query,1,1000)
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63 local posts = {}
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64 for _, doc in ipairs(docs) do
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65 posts[#posts+1] = from_doc(doc)
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66 end
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67 return posts
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68 end
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69
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70 return Post